JPH0159590B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention is an electronic calculation practice machine, in particular, allows learners such as children to calculate calculation problems automatically created and displayed inside the practice machine by hand, and then input the results using keys. The present invention relates to an electronic calculation training machine in which the input data is input into the training machine and the correct answer is compared with the correct answer. Various calculation practice machines have been proposed in the past, some of which are already commercially available. A typical example is "Little Professor" (trade name) manufactured by Texas Instruments Inc. in the United States. In this device, practice problems are automatically created inside the device, and the user solves the created practice problems by hand, inputs the results into the device from the key input section, and compares the correctness of the answers. When a predetermined number of questions are completed, the score for the correct answer is displayed. An object of the present invention is to improve the above conventionally proposed or commercially available devices to provide a calculation practice machine that is easy for users such as children to operate. According to an embodiment of the present invention, there is a display means for automatically creating a calculation problem and displaying the problem, an input means for inputting an answer calculated by the learner himself, and a determination as to whether the input answer is correct or incorrect. In a device equipped with a means for notifying the results, the display means has a two-stage structure of a multi-digit display section, and the display means is configured to display various information other than the question display. The score for the correct answer is displayed using a 100-point scoring system, as well as the specified number of questions, number of correct answers, and question group number. In addition, in order to make it easier to understand whether the answer is correct or incorrect, the display means blinks and an alarm sounds. Furthermore, all digits of the numerical value of the answer obtained by the learner by hand calculation etc. are input into the device using the key input section and stored, and then the correct/incorrect judgment instruction key (answer key) is used.
A comparative judgment is made by the operation of . A slide switch is provided to set the difficulty level of the calculation problem, and after setting the difficulty level using the slide switch, the number of digits of the calculation problem to be asked can be changed to "00+00" by operating the Diyun key. It is displayed by the display means as follows. A switch is provided to select the number of calculation problems, and the number of problems can be set to 10 by operating the selection switch.
A selection of "25" and "100" is made. A numeric key, an answer key, and a redo key are provided as an input means for the learner to input answers calculated by himself/herself, and the counting operation of the counting means that counts and stores the number of correct answers can be selectively performed in connection with the combined operation of these keys. Let's do it. Since the same practice problem group is repeatedly selected, a specific practice problem is generated depending on the combination of the numerical keys and the start key. An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an external view of the electronic calculation practice machine of the present invention, which is a bookcase type practice machine consisting of a display section, a key operation section, a memo pad section, a difficulty level table, and a writing utensil section. In the figure, a main body cabinet 1 has a power supply section, an electronic circuit, etc. inside, and a multi-digit, two-level display section 2 for displaying calculation problems, answers, and other information on the inside surface, and a display section 2 for displaying calculation problems, answers, and other information, and addition, subtraction, multiplication, and division problems. Type selection switch 3, number of questions selection switch 4, power on/off and problem difficulty selection switch 5, input key section 6 consisting of numeric keys and function keys such as answer, retry, etc., problem type and difficulty level table 7. have. There is also a memo pad section 9 for storing magic notes etc. on the inside surface of the lid cabinet 8.
and a writing instrument 10, both cabinets 1
and 8 are connected by a hinge 12 so as to be openable and closable. Further, a power switch 11 is provided in the main body cabinet 1, which is turned on and off as the cabinets 1 and 8 are opened and closed, and the power switch 11 is turned on when the cabinets 1 and 8 are opened and closed. FIG. 2 shows a circuit configuration diagram of an embodiment of the present invention, and the main part is a one-chip integrated circuit device (LSI) having a processor, read-only memory (ROM), and random access memory (RAM), as described later. 21, the read-only memory (ROM) is microprogrammed according to the functions described later, and the ROM is programmed in a firmware manner. The integrated circuit device (LSI) 21 has a power terminal GND,
V _DD , input terminals K ₁ to _{K 4} , display segment information output terminals S ₁ to _{S 7} and timing signal output terminals R ₀ to
It has R ₁₁ , R ₁₄ to R ₁₅ . The display section 2 has a two-stage structure of 10-digit fluorescent display elements DP2 and DP2, and the shape of the display segment electrode of each digit is shown in FIG. In FIG. 3, the display electrodes of the upper display DP1 are shaped like a "Japanese" character for the lowest digit to the fourth line, "〓" shape for the fifth digit to indicate symbols for addition, subtraction, multiplication, and division, and for the sixth to ninth digits. It has a ``Japanese'' character shape, and the most significant digit is a symbol ``○ ×'' that indicates whether the calculation result is correct or incorrect. In addition, the display electrode of the lower display body DP2 has the lowest digit to the 6th digit in the form of a "Japanese" character, the 7th digit as a symbol "=", and the 8th digit as a blank digit.
The 9th to 10th digits are arranged in the shape of a Japanese character.
Further, each display electrode is classified into S1 to S7, and the corresponding electrodes are commonly connected. In FIG. 2, heaters H1 and H2 of display bodies DP1 and DP2 are lit by independent AC power supplies T1 and T2, respectively, but display body DP1
The potential of the heater H1 becomes -V only when the transistor _Tr1 is conductive, and the potential of the heater H1 becomes -V only when the transistor Tr1 is conductive.
The potential of the heater H2 of the DP2 becomes -V only when the transistor _Tr2 is conductive, and becomes the ground level via the resistors R1 and R2 when the potential -V is not applied. As described above, corresponding segment electrodes of the display electrodes of each digit of the display bodies DP1 and DP2 are connected to each other, and receive voltage supply of display information from the output terminals _S1 to _S7 of the LSI 21. Display body DP1,
The first digit grids G ₁₀ and G 20 of the grids G ₁₀ to _{G 19} and G ₂₀ to G ₂₉ of DP2 are connected to the timing signal output R ₀ of the LSI 21, and similarly, the ninth digit grids G ₁₈ and G ₂₈ are connected to the timing signal output R 0 of the LSI ₂₁ . The grids G19 and G29 of the 10th digit are connected to the timing signal output _R8 , respectively, and the grids _G19 and _G29 of the 10th digit are connected to the timing signal output _R9 . Timing signal R ₀ to R ₉ output from LSI21
, and R ₁₀ and R ₁₁ are digit time signals that define each digit of numerical information, and as shown in FIG. 4, these signals are out of phase with each other. Further, the timing signals _R14 and _R15 are word time signals having different phases, which are inverted every 12 digit times of the timing signals _R0 to _R11 , as shown in FIG. ₁ and Tr ₂ are alternately turned on every word time, and the LSI
The display information outputted from the terminals S ₁ to _{S 7} of 21 is distributed and displayed on the display bodies DP1 or DP2 every word time. Power supply unit I includes an external power supply jack A, a battery power supply B, and a power switch _S1 connected in series to the power supply circuit.
(switch 11 in Fig. 1) and S ₂ (on/off contact of changeover switch 5 in Fig. 1), DC-
The switching transistor Tr ₃ that constitutes the DC converter, the oscillation transistor Tr ₄ , the starting resistor R ₇ , the limiting resistor R ₈ , the oscillation control Zener diode ZD, the efficiency increase capacitors C ₁ and C ₂ , the ripple capacitor C ₃ , rectifier diode D ₁ ~
D ₃ , smoothing capacitors C ₄ to C ₆ and the like, and the heater AC voltage and DC negative potentials V _DD , -V, -V' are supplied from the power supply section I. Note that the above-described power supply unit I has a generally well-known circuit configuration and is not directly related to the gist of the present invention, so further explanation thereof will be omitted. The changeover switches 3, 4, 5 and the input key section 6 shown in FIG. 1 adopt the strobe key system and are arranged in a matrix, and the numerical keys □0 to □9 are each connected to the timing output terminal R ₀ of the LSI 21. It is connected to receive the signal from ~ _R9 and to supply a timing signal corresponding to the pressed key to the input terminal _K1 . Similarly, the function keys have been redone,
Answer, start, stop, too much,
The digital keys are connected to receive timing signals from the output terminals _R0 to _R5 , respectively, and to supply a predetermined timing signal to the input terminal _K2 . In addition, the problem difficulty level changeover switches ~ receive timing signals from output terminals R ₀ ~ R ₄ , respectively, and input terminals
K ₃ is connected to supply a predetermined timing signal. Similarly, question type changeover switches □+, □−, □÷ and problem number changeover switches 10 and 25 receive timing signals from output terminals R ₆ , R ₇ , R ₈ and R ₁₀ , R ₁₁ , respectively, and input terminal K It is connected to provide a timing signal corresponding to the switch set to ₄ . Note that the output terminals R ₀ to _{R 11} ,
R ₁₄ ~ R ₁₅ and input terminals K ₁ ~ _{K 4} are clamp resistors r ₀
~ _r11 and _r12 ~ _r15 to the potential -V'. In the above configuration, for example, when the key □2 is pressed, the timing signal output from the output terminal _R2 is input to the terminal _K1 , so that it is decoded inside the LSI 21 that the key □2 has been pressed. Similarly, if switches □+ and 10 are set, the terminal
The timing signal output from R ₆ and R ₁₀ is the terminal
Since it is input to _K4 , it is determined that switches □+ and 10 are set inside the LSI 21.
Note that no timing signals are input to switches, □×, and 100, but the settings of these keys are used to determine inside the LSI 21 whether a timing signal is not input to terminals K ₃ and K ₄ , for example, when the power is turned on. Then, it is recognized that the above switch is set. An example of the internal configuration of the integrated circuit device (LSI) 21 shown in FIG. 2 is shown in FIG. In the same figure, LSI21
has an arithmetic control unit 50 for arithmetic and judgment control, and an address counter 52 that specifies the address of a memory location in a read-only memory (ROM) 51 that stores microprogram instructions. ROM5
1 is programmed in a generally known manner according to the functions described below, and can be efficiently programmed in firmware form, for example by selectively retaining or omitting memory functions.
The internal timing of the LSI 21 is controlled by an oscillator 53 and a timing circuit 54 that generates the timing signal mentioned above.
and is generated by the display control signal generation circuit 55.
Input signals from the key input unit and each selection switch are applied to the LSI 21 via terminals K ₁ to K ₄ , and these signals are input using a generally known key strobe method.
It is identified according to the output from the ROM 51 and converted into a code signal corresponding to each key. LSI2
1 further includes random access memory (RAM) 57
It has data and stores the internal state of the LSI 21. The information stored in RAM57 is ROM5
The information of the memory address specified by the address counter 58 controlled by the arithmetic control unit 5
0, and if it is a display cycle, the data introduced into the arithmetic control section 50 is transmitted to the terminals _S0 to _S7 via the segment decoder section 59 and the buffer circuit 60.
It is output as display segment information. Pulses from output terminals R ₀ -R ₁₁ scan the display digits or key inputs and selection switches as shown in FIG. Pulses generated from this scan operation are applied to the input section 56 of the LSI 21 via terminals _K1 to _K4 . FIG. 6 shows the internal configuration of the RAM 57 in FIG. 5, and the RAM 57 is composed of eight memories (A to H) each having a storage capacity of 16 digits (one digit is 4 bits). FIG. 7 further shows the internal states assigned according to each piece of memory information in the RAM 57 in FIG. 6 when practice problems are being generated and displayed, and FIG. RAM when the number of scores, number of questions, number of correct answers, and numbers are displayed after the practice questions have been completed.
The internal state of 57 is shown. In FIG. 7, the memories A ₀ to A ₉ of the RAM 57 and
B ₀ to B ₉ are used as display registers, with A ₀ and B ₀ corresponding to the first digit, and A ₉ and B ₉ corresponding to the tenth digit. The detailed breakdown _is as follows: register J (A ₉ ) for displaying symbols _“ ○,
Function symbol display register FD (A ₄ ) (+
...Code 10, -...Code 11, ×...Code 12,
÷...Code 13) Arithmetic number display register BD A ₀
~A ₃ , problem number display register MOD B ₈ ~ _{B 9} ,
“=” symbol display register EQ B ₆ (=……code
11) and answer display registers ASD B ₀ to _{B 5} , and the contents of these registers are displayed on the display section 2 . The answer storage registers AS G ₀ to _{G 5} store calculation results calculated in the calculation registers. Each time a problem occurs, a numerical value "1" is added to the problem number storage register MO (G ₈ to G ₁₀ ), and the contents are transferred to the register MOD and displayed. Exercise number storage registers L H ₁₂ to _{H 15} are registers for storing preset exercise numbers (practice problem group numbers), and their contents can be set by operating the numerical keys and start key as described later. It is set to "1" when the power is turned on. The registers SE F ₈ to F ₁₀ for storing the number of correct answers store the number of correct answers, and the contents of the registers ASD and AS are compared in the arithmetic control unit 50 for each practice problem, and if they match, the numerical value "1" is set in the register SE. will be added. The registers TM H ₈ to _{H 10} for storing the total number of questions store the contents specified by the number of questions changeover switch 4. Random number storage registers RM H ₀ to _{H 7} store the numerical values (random numbers) used to create the next problem even after creating one practice problem, and store new random numbers one after another each time a practice problem is created. do. The arithmetic function storage register FN F ₄ contains the arithmetic symbol information specified by the question type switch 3: addition (1010) code, subtraction (1011) code, multiplication (1100) code, division (1101) code. Each is coded and stored. The difficulty level storage register Z F ₅ stores difficulty level information (levels 1 to 6) selected by the problem difficulty level changeover switch 5 . The flag registers FF F ₆ to _{F 7} store the control state of the LSI 21 and are used as conditional flip-flops (hereinafter referred to as flags F ₆₁ , F ₆₂ , F ₆₃ , F ₆₄ , F ₇₁ ,
F ₇₂ ). The registers TE B ₁₄ to B ₁₅ , C ₀ to _{C 1} are used for time control to make the display blink when one practice question is answered correctly or when the score is 100. is counted up until the content reaches a certain value. The remainder storage registers AM E ₀ to _{E 2} store remainders in division practice problems. Next, the internal state of the RAM 57 in the score display state will be explained with reference to FIG. In this figure, the contents of the display register are different from the state shown in FIG. 7, but the other parts are the same. In other words, when the score is displayed,
The data previously stored in display registers A ₀ to _{A 9} and B ₀ to _{B 7} is cleared, and the practice number information stored in practice number storage registers H ₁₂ to _{H 15} is transferred to practice number display register LD. Transferred to _A5 to _A8 . Similarly, the register for storing the number of correct answers SE F ₈ ~ _{F 10}
The score is calculated out of 100 based on the number of correct answers stored in the memory, and the result is displayed in the score display register.
Transferred to TO A ₀ ~ A ₂ . Further, the contents of the register SE are transferred to the registers SED B ₀ to _{B 2} for displaying the number of correct answers, and the contents of the register MOD are held as they are. Next, the structure and operation of the apparatus of the present invention will be explained in detail in accordance with actual calculation practice operations. First, prior to this explanation, the functions of the selection switch group and each key in the key input section will be explained. The calculation type changeover switch 3 is composed of a slide switch with four positions, and sets the types of four arithmetic calculations. The number of questions changeover switch 4 is composed of a three-position slide switch, and selectively sets the number of questions to 10, 25, or 100 questions. The difficulty level changeover switch 5 is composed of a six-position slide switch, and sets problems of difficulty levels corresponding to classes 1 to 6. The puzzle key is operated when newly setting the four arithmetic calculations, the difficulty level, and the number of questions. When the key is pressed after each setting, each setting information is stored inside the LSI 21. The start key is operated when starting a series of calculation exercises, and when the key is pressed, a problem generation mode is set, and problems are generated according to the contents of the set changeover switch and the exercise number. Numerical keys □0 to □9 are operated when setting the practice number and answer, and in the problem generation mode, they are the numbers for the answer, and in other cases, they are the numbers for the practice number. The remainder key is used to set the remainder in division, and the quotient and remainder are set by manipulating the quotient and the remainder. The answer key is operated to judge whether the answer entered is correct or incorrect. The stop key terminates problem generation, resets the problem generation mode, and displays the score and number of correct answers. The redo key is operated when correcting the practice number and answer number, or when redoing a calculation when an incorrect answer is displayed. Next, the configuration and operation of this device will be explained step by step from when the power is turned on. First, this device is configured so that the number of digits in a calculation problem is displayed as a numerical symbol such as "0" when the power is turned on or after the user operates the play key. In other words, when a learner studies on a training machine, it is necessary not only to select addition, subtraction, multiplication, and division, but also to select the operand and the number of digits of the operand. The number of digits of the operand and effect number of the problem that will occur in connection with this selection is displayed as "0". For example, multiply before or after power on,
The case where the setting is level 1, 25 questions and the game key is pressed will be explained with reference to the operation explanatory diagram in FIG. 9. First, in synchronization with turning on the power or by operating the standby key, information on the number of questions 25, multiplication code 12, and difficulty level 1 are stored in registers TM, FN, and Z, respectively. Then memory area D _0~15 is cleared,
Function (X) stored in register FN _F4 is moved to memory area _D4 . Next, input "1111" into memory areas A _{0 to 15} and B _{0 to 15} to blank the display. Next, by determining the content of F ₄ , since the content of F ₄ is "12", it is determined that it is multiplication, and the difficulty level is determined to be level 1 because F ₅ = 1,
Based on the determination result, the contents of _D3-5 are moved to _A3-5 , and furthermore, the memory areas _H8-9 storing the number of set questions are moved to _B8-9 . Through the above operations, the display on the display unit 2 becomes as shown in FIG.
Number of digits of operand and operation number “0×0”, number of problems 25
is displayed. Further, FIG. 11 shows an example in which the number of digits of the operand and the operand are displayed using symbols other than "0". The above-mentioned operations are executed according to microprogram instructions that are stored in the ROM and sequentially output, and the operations described below are also performed using the ROM.
The control is executed by the output of In other words, in the device of the present invention, the ROM is programmed by firmware according to the operation explanatory diagrams described above and later. In order to generate practice problems, calculation problems are sequentially created and displayed by operating a start key. Next, the operation of generating practice questions will be explained with reference to the operation explanatory diagram of FIG. 12. There are two ways to start learning calculation problems: one is to operate the start key, and the other is to operate the start key after specifying a group of practice problems using numerical keys. In addition, in the device of the present invention, a series of practice problems are created using random numbers generated by the multiplicative congruence method, and this problem is created using a given initial value (a numerical value related to the numerical value representing the group of practice problems).
If the problem group has the same exercise number, the same problem will always occur. First, by pressing the start key, all memory areas C ₀ to C ₁₅ are cleared. Next, the contents _of flag register _F62 are determined.
It is a flip-flop that is set when lead-in is performed, and is in the set state when the practice problem group number is input, and the input information is stored in memory areas B0 _{to B5} . Assuming that _F62 is now set, next the contents of _B0-5 are moved to _C0-5 , and the contents of _C0-5 are shifted to the right until there is no blank signal "15" in _C0 . By this operation, the lead-in numerical value as the practice problem group number is held in the memory areas C0 _{to C5} with _C0 as the first digit. On the other hand, if the start key is pressed without leading in a numerical value, "1" is input into C ₀ based on the determination that F ₆₂ =0.
As a result, practice number "1" is set. Next, input “1” to C ₅ , and write memory area C _{0 to 9} .
Generate random numbers using the multiplicative congruence method using the contents of as initial values. The multiplicative congruence method is a method of generating random numbers by X _i+1 = 23Xi (mod 10 ⁸ + 1), and Xi is
The remainder after multiplying by 10 ⁸ +1 is set as X _i+1 . Specifically, first transfer the contents of memory area C _{0 to 9} to memory area D _{0 to 9} , then execute C _{0 to 9} + D _{0 to 9} → C _{0 to 9} , and then transfer the contents of C _{0 to} 9. Shift left by 1 digit and return to C _0~9
+D _0~9 → Execute C _0~9 three times, then after clearing D _0~9 , transfer C _8~9 to D _0~1 , and sometimes after clearing C _8~9 , C _0~7 - Execute D _0~1 → C _0~7 , transfer C _0~7 to random number storage register H _0~7 , and generate a problem from this random number. In addition, if new problems arise
Random numbers for creating questions are sequentially generated by executing the above-mentioned calculations based on the numerical values stored in H0 _{to H7} . For example, if the initial value is (100001), the following random numbers will be generated in sequence. (2300023), (52900529),
(16712155), (84379562), (40729907)...Also, if the practice problem group number is 7, the initial value is (100007), (2300161), (52903703),
Random numbers (16785157), (86058608), (79347965)... are generated in sequence. Next, the operation of creating and displaying a calculation problem from the random numbers will be explained with reference to the explanatory diagram of FIG. 13. When displaying a calculation formula in the device of the present invention, the operand and the number of operands are displayed adjacent to each other around the function symbol (+, -, ×, ÷). It is easy to read and matches the writing format of commonly used problem sets. As an example, the occurrence of a problem and the display of a calculation formula will be described for the case where the problem group number is "1", multiplication, and the difficulty level is set to level 1. First, as mentioned above, the first random number (2300023) is generated, but it is not used because the 4th or 5th digit is "0", and similarly the second random number is not used and the random number (16712155) is generated. Used to create the first calculation formula. First, the contents of random number storage registers _H0-7 are transferred to memory areas _D0-7 . Next, _D4 to D7 are shifted to the left once, and the contents of the previously stored function _F4 (x symbol) are transferred to _D4 . At this time, the contents of D0 _{to D7} are (671×2155). Further, a blank signal "15" is input to the memory areas A _{0 to 15} and B _{0 to 15} . Next, by determining the contents of _F4 and _F5 , it is determined that this is a first-class multiplication problem creation operation, and memory areas _D3-5 are selected and transferred to _A3-5 . Also
The code “11” that displays the “=” symbol is input to B ₆ , and the number 1 is added to the registers G _{8 to 10} for saving the number of questions (G _{8 to 10} are initially cleared). Transfer the information on the number of questions G _8-9 to B _8-9 . By the above-described operation, the 14th
As shown in the figure, the calculation formula (1×2) and the number of problems "1" are displayed, and the operands and the number of operations are displayed centered on the multiplication symbol "x". The correct answer to this calculation problem is calculated by the calculation control unit 50, and then the most significant digit is stored in registers AS G _{0 to 5} .
It is stored as being located at G ₅ . After that, the same operation is executed and the calculation problem (7×
9), (2×9)... are automatically created in sequence. Next, a description will be given of the operation when the user calculates the calculation problem displayed on the display section by hand, etc., and reads in the answer using the numerical keys. In the device of the present invention, even if the answer obtained by hand calculation etc. exceeds the display allowable digit N, it is possible to perform a lead-in of N digits, and the lead-in operation of the exceeded digit is stored internally, and the next answer key is used. It is configured to perform error detection during correct/incorrect processing during operation. In other words, if the answer that the user solved by hand or by rote exceeds the number of displayed digits, and the value of the displayed digit matches the correct answer, even though the user's calculation was incorrect. , there may be cases where the answer is determined to be correct. For example, if the number of digits that can be entered in the answer is 6 digits, and you calculate 823×571, the correct answer is 469933.
However, if the user answers 4699330, which is one more digit, the displayed part will be the same as 469933, and there is a possibility that the answer will appear to be correct. On the other hand, in the apparatus of the present invention, the number setting operations for display digits or more are stored, and an error is determined at the subsequent correct/incorrect determination. FIG. 15 is an explanatory diagram of the operation when inputting the answer obtained by written calculation or mental calculation using the numerical keys.
□N means the operation of the numeric key, and when the first numeric key is pressed, B ₅ = 15 is determined, and the operation of storing the numeric value N in B ₅ and setting the flag register F ₆₂ is executed. Ru. When setting the next number, B ₅ ≠ 15, B ₄
=15, the numerical value N is stored in _B4 , and the same operation is repeated and the devices are stored in B0 _{to B3} . When the numeric operation is further advanced and the seventh numeric value is entered, B _{0 to 5} ≠ 15, so the flag flip-flop F ₇₁ is set, and this F ₇₁ allows the digits of the answer greater than or equal to the display digits (significant digits) to be set. I remember that it was hot,
It will be used for subsequent correct/incorrect judgment processing. Next, the function of the answer key will be explained. The answer key in the device of the present invention has two functions: a function of comparing the correct answer value with the input answer, and a function of calling up the correct answer value. These distinctions are made by the storage states of flag registers _F62 and _F64 , and the details will be explained below with reference to the operational diagram of FIG. 16. First, when the answer key is pressed, it is determined whether the content of _F62 is "0" or not, and if the numeric key was pressed and _F62 was set before the answer key was pressed, _F62 is set. is reset, and then the process moves on to determining the _F71 flag. As mentioned above (explanation of Figure 15), the F ₇₁ flag is a flag that is set when _a numerical value of 6 or more digits is entered.
is set, it is determined that the input answer is incorrect. Code 1 for displaying the error symbol "x" is stored in A ₉ , and flags F ₆₄ and F ₇₂ are set.
After setting and resetting _F71 , the program moves to the display routine, and the "x" signal in the upper most significant digit of the display lights up. If the flag _F71 is in the reset state, the next memory area _B0-5 where the answer input by the user is stored and the memory area where the correct answer value is stored are stored.
The contents of G _{0 to G 5} are compared and verified, and if they do not match, the routine shifts to the aforementioned 1→A ₉ and F ₆₄ and F ₇₂ set routines. Also, if the comparison result matches
After determining the _F72 flag and adding “1” to the correct answer number storage registers F8 to _F10 if _F72 has been reset, code 6 is used to display the correct answer symbol “〇”.
is stored in _A9 , and the process moves to the correct answer flashing display routine. Also, if F ₇₂ is in the set state, it is determined that the correct answer has been input after a mistake has been displayed once, and the code 6 is directly stored in A ₉ and blinks without executing the operation of counting the number of correct answers "F _{8 ~ 10} + 1". Move to display routine. On the other hand, if you press the answer key and after the verification results in an incorrect display and F ₆₄ is set, if you press the answer key again, the correct answer will be determined by the determination of the reset state of F ₆₂ and the determination of the set state of F ₆₄ . The contents of memory areas G _{0 to 5} that store , are transferred to memory areas B _{0 to 5} , and the correct values are displayed. Next, a preprocessing operation for displaying the remainder when the practice problem is division will be explained. In the device of the present invention, the quotient and remainder in division are displayed simultaneously, and the boundary between the quotient and remainder is separated by a blank or a special symbol. Assuming that the integer answer to the current division problem is stored in G _{0 to} 5 and the remainder is stored in E _{0 to} 2, we will explain the preprocessing operation for displaying the quotient and remainder with reference to the operation explanatory diagram in Figure 17. . The integer answer (quotient) is stored in G0 to _G5 with the most significant digit located in _G5 as described above. That is, the answer (Ans) calculated inside the integrated circuit device (LSI) 21 is shifted to the left until the numerical value reaches the most significant digit of the memory areas _{G0 to G5} , and a blank signal 15 is input to the least significant digit. After determining that a numerical value has arrived at _G5 , the contents of memory _F5 are determined, and it is determined whether the selected difficulty level is level 6 or not.
The difficulty level of division is grade 1 (2 digits ÷ 1 digit), grade 2 (2 digits ÷ 1 digit), grade 3 (3 digits ÷ 1 digit), and grade 4 (3 digits ÷ 2).
digits), 5th grade (4 digits ÷ 2 digits), and 6th grade (4 digits ÷ 3 digits). When calculating for 5th grade, the integer answer is a maximum of 3 digits, the remainder is a maximum of 2 digits, and 6 When calculating classes, integer answers have a maximum of 2 digits and remainders have a maximum of 3 digits. Therefore, when displaying these contents within 6 digits, the remainder should be displayed in the order of 1 from the bottom for grade 5.
For the 6th grade, the 1st to 3rd digit from the bottom
Must be displayed in the digit. Therefore, in the device of the present invention, by changing the display position of the remainder for 6th grade and for other times, 6
The quotient and remainder can be displayed in digits. The specific process is to first judge the contents of memory F ₅ to determine whether the difficulty _level is level ₆ or _not . 0"
The contents of E ₂ to _{E 0} are transferred to G ₀ to 2 in order from G ₂ from the point where it is not “0”, and if it is other than grade 6, it is transferred in the order of E ₁ and E ₀ . Determine whether the memory content is “0” or not, and from the point where it is not “0”
Transfer the contents from G ₁ to G 0 to ₁ in order, and transfer the contents to memory G _{0 to 5} .
The quotient and remainder are stored adjacently via a blank digit. Therefore, as mentioned above, when the correct answer value is displayed by operating the answer key twice in succession, the contents of G _{0 to 5} are transferred to B _{0 to 5} , and the quotient and remainder are displayed on the display. . For example, difficulty level 3
In the calculation of 9876÷5, the quotient 1975 remainder 1 is displayed in a line with blank digits in between, as shown in Figure 18. Note that a special symbol other than a numerical value may be displayed in the blank digit separating the quotient and remainder. Next, the function of the Redo key will be explained. The redo key in the device of the present invention has a function to correct the entered numeric value operation, for example, read-drain a numeric value, and even if the number is 6 digits or more and the _F71 flag is set, the redo key can be operated next time. If F ₇₁ is reset and returns to its original state, it will lead in the numeral position again, and if the numeral position is the correct value, the correct answer will be displayed (○ symbol display) by the subsequent operation of the answer key, and the correct answer will be displayed. A function to add "1" to the contents of the number storage register and a function to clear the "x" display that indicates the answer and error by operating it when redoing a calculation. For example, when a numerical value is lead-in, and the numerical value is lead-in by 6 digits or more. When F ₇₁ is set, then operate the answer key, and after a mistake is displayed (×), operate the Redo key to clear the answer display, then lead in the correct answer value, and press the answer key. It has a function that does not count the number of correct answers even if the correct answer is displayed (○ mark) by operating the button. This operation will be explained with reference to the operation explanatory diagram of FIG. 19. Now, by leading in a numerical value, flag _F62 is set as shown in FIG. 15, and if a numerical value of 6 or more digits is further led in, flag _F71 is set. If you press the Redo key at this point,
The set state of _F62 is determined, _F71 is reset, blank signal 15 is input to display registers _B0-5 , and _F62 is reset. After that, a numerical value is read in, and if the value is the correct value, the answer keys are operated to set _F62 to the set state, _F71 to the reset state, and B0 to _B0 , as explained in FIG. ₅ , the matching state of G _{0 to 5} , and the reset state of F ₇₂ are determined, and the number of correct answers is saved in the register.
“1” is added to _F8-10 . On the other hand, if you enter a numerical value of 6 digits or more, or if you press the answer key after entering an incorrect answer, an incorrect answer will be displayed as described above (1 → A ₉ ).
Then, F ₆₄ and F ₇₂ are set, and F ₆₂ and F ₇₁ are reset. Next, when the Redo key is pressed, the reset state of _F62 is determined, and blank signal 15 is input to answer display registers B0 to _B5 , and _F62 is reset, but _F72 and _F64 remain set. There is even. Therefore, it follows with a lead-in number,
If that value is the correct value, the following answer key operation will determine the set state of F ₇₂ , and memory F _{8 to 10 will} be set.
is not counted up and shifts to the correct answer display operation of the 〇 symbol. Next, the blinking display routine after operating the answer key will be explained. In the device of the present invention, whether or not the substituted answer is correct is notified by blinking all the digits on the display.The detailed operation is shown in FIG. 20. I will explain it together. When moving to the blinking display routine, first the memory area is
C _0~15 and B _14~15 are cleared, then 13 to B ₁₅
(1101) is subjected to binary addition, and the result is stored in the accumulator AC in the arithmetic control unit 50, and the occurrence of carry is determined. Since no carry has occurred at this time, the process moves on to the next step of adding "1" in binary to _B14 . In this case as well, since no carry occurs, the program moves to the display lighting routine, and in the display lighting routine, the contents of memories A _{0 to 9} and B _{0 to 9} are dynamically updated for one cycle (timing signal R ₁₄
or one cycle of R ₁₅ ), and then display 13 again on B ₁₅ .
becomes a process of binary addition, and this operation is repeated.
At the 16th time of this repetitive operation, in the process of adding "1" to _B14 in binary, it is determined that a carry has occurred, and 1 is added to _B15 in binary. Furthermore, when this repetitive operation is executed 32 times, the content of B ₁₅ becomes 3, a carry occurs in the process of adding "13" in binary to B ₁₅ , and a carry occurs in the process of adding "13" in binary to accumulator AC. change. At this time, since the content of AC is "0", no carry occurs when adding "13", and the process moves to adding "1" in binary to _B14 . At this time, the content of _B14 becomes "1" and no carry occurs. Therefore, the process proceeds to the step of adding "1" to the memory _C0 . Since no carrier is generated at this time, the routine moves to the display light-off routine, where the display is turned off for the same time as the display light-on routine, and the process of adding "13" to _B15 again is performed. At this time, since the previous content "3" of B ₁₅ has not changed, a carry occurs again, and the operation shifts to adding "1" in binary to B ₁₄ again. This operation is repeated, and on the 16th time, a carry occurs in the process of adding "1" to B ₁₄ in binary,
Add 1 in binary to the contents of _B15 , and at this time the contents of _B15 become "4". Furthermore, if this repetitive operation is executed 32 times, a carry occurs when "13" is added in binary to B ₁₅ , and the accumulator AC becomes 3.
Therefore, a carry occurs when "13" is added in binary to the accumulator AC,
_B15 is reset to "0" and the display lighting routine is started again. By repeating the above display lighting routine and display lighting off routine once, the memory C ₁ becomes 3, and by repeating this lighting/extinguishing cycle three times, the content of C ₁ becomes "9". Therefore, when C ₁ becomes 10 in the fourth blinking routine, a carry occurs because 6 is added to C ₁ in binary, and the blinking display routine ends with the judgment of this carry, and the next problem number matching routine to move to. As a result of the above operations, the display area may change to 0.4, for example.
It flashes three times at intervals of seconds to notify the practitioner that the answer entered is correct. In this case, an alarm may be emitted. The number of questions comparison routine compares the number of questions set in advance and the number of questions that have occurred up to now, and if they are different, moves the random numbers stored in memory H _{0 to 7} to calculation registers C _{0 to 9} and starts the next one. Shift to the problem creation routine (Figure 12*2). If the set number of questions matches the current number of questions, the process moves to the end routine (end of FIG. 21). For F ₆₃ , the correct answer blinks during practice, the next time a new problem occurs, the stop key is operated, and the blinking display routine is activated when all the questions are answered correctly, then the problem that has already occurred is displayed. This is to make a decision to display and proceed to the display routine to continue learning. Next, a routine for displaying the number of questions, the number of points, the number of correct answers, and the practice number on both ends of the display section will be explained. The device of the present invention is configured to display the current score and number of correct answers together with the number of questions and the exercise number at the end of a practice question or when the stop key is operated.
This will be explained with reference to the operation explanatory diagram in the figure. The state of the registers when the device is currently experiencing a problem is, for example, memory A ₅ to _{A 3} [3C4] (C indicates code 12 indicating multiplication), B ₆ [=], B ₉ to B ₈
[11], F ₈ [8], F ₇

[0], G ₉ ~ _{G 8} [11], H ₁₅ ~ _{H 12}
[123F], H ₉ to _{H 8} [25]. (However, F indicates a blank code 1111.) If the stop key is operated in this state, problem generation ends and the number of problems, score, number of correct answers, and practice number are displayed.This process will be explained below. First, the contents of flag _F72 are determined. This judgment is made when a certain question occurs, and when you input the answer and press the answer key, if the answer is correct, it will automatically flash to notify you of the correct answer, and then the next question will occur and the device will stop working. It is in the state of waiting for input, and if the answer is wrong, it stops at that problem and the next problem does not occur. Therefore, when operating the stop key, if after an incorrect answer, the number of questions currently displayed indicates the number of questions that have already been executed, but if after a correct answer, the number of questions currently displayed The number of questions is one more than the number of executed questions. this state
Judging by the state of F ₇₂ , if F ₇₂ is set, proceed to the next step, if F ₇₂ is reset, G _8~9
The numerical value "1" is subtracted from this, and the contents of memories _G8-9 become "10" from "11". In the next step, memories C _{0 to 15} and D _{0 to 15} are cleared and memory
A blank signal 15 (1111) is input to A _{0 to 9} and B _{0 to 9} . In the next step, the contents of registers _F8-10 for storing the number of correct answers are transferred to _B0-2 , and
The number of correct answers is transferred to CCs _{2 to 4} as pre-processing to calculate the score. In this explanatory example, the correct number is a single digit "8", so this numerical value is stored in B ₀ and C ₂ . Next, move to the step and register G _{8 to 10} for saving the number of questions.
The content of is moved to B _8-10 and also to D _0-2 in preparation for calculating the score. In this example, the number of questions is 2 digits "10", so the number is B _{8 to 9} .
and transferred to D _0-1 . Next, move on to the steps.
The contents of practice number storage registers _H12-15 are moved to _A5-8 . Next, move on to the step and calculate the score.
C _2-4 /D _0-2 ×100 is executed and the result is found in E _0-2 . In this example, there are 10 questions and 8 correct answers.
Therefore, the number 80 is stored in E _0-1 . Next, the process moves to step 2 and the contents of E _{0 to 2} are transferred to A _{0 to 2} .
In this example, the score is 80 points, which is two digits, so
After being moved to the positions A _{0 to 1} , the next display routine is started, and the practice number, number of questions, score, and number of correct answers are displayed on both ends of the display, respectively, as shown in Figure 22. 10,” “80,” and “8” are displayed. Furthermore, when all the questions asked are correct and the score is 100 points, a transition is made to a blinking display routine based on the determination that E ₂ =1, and the score, etc. is displayed blinking. In the two-stage display section as described above,
The number of questions, score, number of correct answers, and practice number are displayed at the same time. As described above, according to the present invention, for example, when a practitioner of the four arithmetic calculations, usually a child, practices the four arithmetic calculations, he or she can enter the result of the calculation by hand using the key input section. This allows you to check the correct answers, and if you are studying a series of calculation problems, you can see the intermediate results such as your score and number of correct answers even before completing all the problems. It is possible to provide an electronic calculation practice machine that motivates learners to practice and can greatly improve learning effects.

[Brief explanation of drawings]

Fig. 1 is an external view of the device of the present invention, Fig. 2 is an electric circuit diagram of the device, Fig. 3 is a plan view showing the display section of the device, Fig. 4 is a timing signal waveform diagram, and Fig. 5 is a diagram of the timing signal waveform.
Block configuration diagram inside the LSI device, Figures 6 to 8
The figure is a configuration diagram of the random access memory in the LSI device, FIGS. Figure, Figure 11, Figure 14, Figure 18
22 and 22 are diagrams each showing the display state of the display unit. DESCRIPTION OF SYMBOLS 1...Main body, 2...Display section, 6...Key input section, 21...Integrated circuit device (LSI), 50...Arithmetic control section.

Claims (1)

[Scope of Claims] 1. An electronic calculation practice machine for four arithmetic calculations, which includes: (a) means for automatically generating a predetermined number of multi-digit problems having at least two arithmetic numbers; ( b) A first display means for displaying each of the above questions; (c) An input means for inputting the answers calculated by the operator for each of the above questions; (d) Displaying information other than the above questions, including the calculated answers above. Second display means (e) Judgment means for determining whether the above-calculated answers are correct or incorrect (f) Ratio calculation means for calculating the proportion of the number of questions answered correctly (g) Selective means for automatically determining the occurrence of the above-mentioned questions. Stop key input means for stopping (h) An electronic calculation training machine characterized by comprising score calculation means for driving the calculation means and calculating the number of points in response to the operation of the stop key input means.