JPH0793257A - Electronic calculator - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to allow a child or the like who receives fractional education to easily understand the principle of fractional calculation in an electronic computer having a fractional calculation function. [Structure] An integer value and a fractional value input as operands are a pie chart display having a numerical segment (10's digit) 14, a circular segment (1's digit) 15 and a radial segment in the first display area 11a. Displayed in 16 (fractions),
The integer value and the fractional value input as the calculation number are the numerical value segment 14 and the circular segment 1 in the second display area 11b.
5, and a circle graph display body 16 having radial segments, and the integer value and fractional value which are the calculation results thereof are circles having a numerical segment 14, a circular segment 15, and a radial segment in the third display area 11c. It is displayed in the graph display body 16 and is in the first and second display areas 11 described above.
The operator display 12 is provided between a and 11b, and the equal sign display 13 is provided between the second and third display areas 11b and 11c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic computer having a fractional calculation function.

[0002]

2. Description of the Related Art In an electronic computer having a conventional fractional calculation function, when a fractional calculation is performed, for example, when "2 and 1/3" is entered by a key, an integer, a number of molecules,
In the order of the denominator, some symbol is inserted between them and "2 /
It is displayed as "1/3" or in a form corresponding to the regular fraction description. That is, in any case, the input fractional value or the fractional calculation result is displayed with the numerical values of the integer, the numerator, and the denominator according to a predetermined array.

[0003]

However, in a conventional electronic computer that displays fractional values as numerical values, what does the fractional value actually mean, especially in children who have not received fractional education or who are beginning to receive it? Do you mean,
That is, for example, 1/3 is difficult to understand because it is one of the three divided into three, and thus there is a problem that it cannot be efficiently used as a teaching material for fractional education. The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic computer that enables the principle of fractional calculation to be easily understood.

[0004]

That is, an electronic computer according to the present invention has a fractional calculation function, and is provided with display means for displaying input fractional expressions and their calculation results in the form of a graph. It is a thing.

[0005]

In other words, as the display means for displaying the input fractional expression and the calculation result, for example, a pie chart-shaped liquid crystal display means composed of a display body having a substantially circular shape by a plurality of radial segments is constructed. , The concrete contents of the fractional value will be expressed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing the configuration of a graph display unit of an electronic computer having a fractional calculation function.

This graph display section uses a liquid crystal display element and has a first display area 11a for displaying the A term input as the operand and a second display area 11b for displaying the B term input as the operand. , And third to display the calculation result
The display area 11c is provided.

Between the first display area 11a and the second display area 11b, an operator display body 12 for selectively displaying each operator of "+", "-", "x" and "÷", or Between the second display area 11b and the third display area 11c, an equal sign display body 13 for displaying an equal sign "=" is provided.

The first to third display areas 11a to 11c
All have the same configuration and are provided with a numerical value segment 14 representing the tens place, a circular segment 15 representing the ones place, and a pie chart display body 16 representing the fraction. In this case, a third segment for displaying the calculation result. As for the numerical value segment 14 of the display area 11c, up to 500 display segments of 100s are provided.

The numerical value segment 14 in each of the display areas 11a to 11c is normally in a non-illuminated state, and only the numerical value portion that needs to be displayed is selectively illuminated. FIG. 2 is an external view showing the configuration of the pie chart display body 16 in the graph display portion of the electronic computer having the fraction calculation function.

The pie chart display body 16 is the display body 1 thereof.
It is composed of 60 radial segments 17 (1) to 17 (60) which are divided by 6 ° in each round of 6. For example, 1/3 display shows 20 segments corresponding to the 120 ° range. The radial segments 17 (1) -17 (20) are illuminated.

Further, a scale segment 18 is provided on the outer circumference of the pie chart display body 16, and "0" and "1/6" are provided.
"25 (meaning 0.25)""1/3""50 (0.5
Meaning) "2/3""75 (meaning 0.75)""5
/ 6 "is added to each corresponding segment position.

FIG. 3 is a block diagram showing a circuit configuration of an electronic computer having the fractional calculation function. This electronic computer includes a CPU (central processing unit) 21, and according to a key operation signal supplied from a key input unit 22, the ROM 2
The operation of each part of the circuit is controlled based on the system program read from the device 3.

The CPU 21 has a key input section 22, R
In addition to the OM 23, the arithmetic unit 24 and the RAM 25 are connected, and the expression display unit 26 and the graph display unit 27 (see FIG. 1).
Are connected via the corresponding display control units (2) 28 and (1) 29, respectively.

The key input section 22 is a graph key 30 operated when setting the pie chart display mode, and a key operated between the integer value input and the denominator input when the fraction input is performed. "Key 31, a" minute "key 32 operated between the input of the same denominator and the number of numerator, a numeric keypad 33 for inputting numerical values from 0 to 9, and a" + "operated when inputting an operator. "Key 34a,"-"key 34b," x "key 3
4c, “÷” key 34d, “=” key 35 operated when inputting an equal sign, and “AC” key 36 operated when clearing data.

The RAM 25 stores in the RAM 25 as an operand.
An X register 37 in which a term is set, a Y register 38 in which a B term as an operation number is set, a Z register 39 in which an operation result is set, and key input operators “+”, “−”, and “x”.
Operator designation code "001" corresponding to "÷"
F set as "010""011""100"
A register 40 and a G register 41 that sets a flag in response to an operation of the graph key 30 are provided.

On the other hand, the expression display section 26 has a key input section 22.
The input expression and the calculation result thereof are displayed as they are in the numerical display format. Here, when the pie chart display mode is set, they are displayed on the expression display section 26 in the graph display section 27. A graph display corresponding to the input expression and the calculation result is performed.

The radial segments 17 (1) to 17 (6) for the respective circle graph display bodies 16 of the graph display unit 27 are described.
The lighting process of (0) is performed according to a pie chart display table stored in advance in the ROM 23. In the pie chart display table, lighting is performed corresponding to each displayed numerical value of "0" or more and less than "1". Radial segment 17 (1) -1 required
The number of 7 (60) is written.

That is, for example, for the displayed numerical value "0.5", the number of lighting segments is "30" and the displayed numerical value is "0.7".
For 5 ", the number of lighting segments is stored as" 45 ".

Next, the operation of the electronic computer having the fractional calculation function having the above configuration will be described. FIG. 4 is a flowchart showing the calculation display processing in the pie chart display mode of the electronic calculator having the fraction calculation function.

FIG. 5 is a diagram showing a graph display state associated with the fractional addition arithmetic processing in the pie chart display mode of the electronic computer having the fractional calculation function. That is, the RAM 25 is operated by operating the graph key 30 in the key input unit 22.
"1" is set in the G register 41 of the CPU 21 and the CPU 21 is set to the pie chart display mode.
3, using the "to" key 31 and "minute" key 32 to enter the operand (A term) "7 and 3/4", the integer "7", denominator "4", numerator The number "3" is stored in the X register 37 (step S1).

Then, the operand (A term) is displayed on the expression display unit 26 in a numerical format such as "7/3/4". Further, as shown in FIG. 5, with respect to the graph display unit 27, seven circular segments 15 in the first display area 11a are turned on, and a pie graph is displayed based on a pie graph display table stored in the ROM 23 in advance. Forty-five radial segments 17 (1) to 17 (45) (see FIG. 2) corresponding to "3/4 (0.75)" of the display body 16 are turned on and displayed in a graph format (step S2). .

When the addition operator is input by operating the "+" key 34a following the operand (A term) "7 and 3/4", the operator designation code "001" is F of the RAM 25. It is set in the register 40 (step S3).

Here, if the number of operations (B term) "8 and 2/5" is input again using the ten keys 33, "and" key 31, and "minute" key 32 in the key input unit 22, The integer "8", the denominator "5", and the numerator "2" are stored in the Y register 38 (step S4).

Then, the addition operator and the operation number (B
The term) indicates to the expression display unit 26 that the operand “7/3 /
After "4", "+" and "8/2/5" are displayed in numerical form. Further, as shown in FIG. 5, the addition operator “+” is displayed on the operator display body 12 on the graph display unit 27, and eight circular segments 15 in the second display area 11b are displayed. In addition, the 24 radial segments 17 (1) to 17 (24) (corresponding to “2/5 (0.4)” of the pie chart display 16 are stored based on the pie chart display table stored in advance in the ROM 23. (See FIG. 2) is turned on and displayed in a graph format (step S5).

When the "=" key 35 in the key input section 22 is operated, the X register 37, Y of the RAM 25
According to the operand “7/3/4”, the operand “8/2/5”, and the operator designation code “001” stored in the register 38 and the F register 40, the arithmetic part 24 performs fractional addition arithmetic processing. This is executed, and the integer "16", the denominator "20", and the numerator "3" that are the addition operation results "16 and 3/20" are stored in the Z register 39 (steps S6 and S7).

Then, the equal sign and the addition operation result are displayed on the expression display unit 26 in numerical form such as "=""16/3/20" following the operation number "8/2/5". It Further, as shown in FIG. 5, for the graph display unit 27,
The equal sign “=” is lit on the equal sign display body 13, and “10” of the numerical value segment 14 in the third display area 11c is displayed.
And six circular segments 15 are lit, and RO
Nine radial segments 17 (1) to 17 (9) corresponding to "3/20 (0.15)" of the pie chart display 16 based on the pie chart display table stored in advance in M23.
(See FIG. 2) is turned on and displayed in a graph format (step S8).

FIG. 6 is a diagram showing a graph display state associated with the fractional subtraction calculation process in the pie chart display mode of the electronic computer having the fraction calculation function. That is, the RAM 25 is operated by operating the graph key 30 in the key input unit 22.
"1" is set in the G register 41 of the CPU 21 and the CPU 21 is set to the pie chart display mode.
3, using the "to" key 31 and "minute" key 32 to enter the operand (A term) "48 and 3/10", the integer "48", denominator "10", numerator The number "3" is stored in the X register 37 (step S1).

Then, the operand (A term) is displayed on the expression display unit 26 in a numerical format such as "48/3/10". In addition, as shown in FIG.
For No. 7, eight "40" of the numerical segment 14 and the circular segment 15 in the first display area 11a are turned on, and the pie chart display body 16 is displayed based on the pie chart display table stored in the ROM 23 in advance. "3/1
18 radial segments 1 corresponding to 0 (0.3) "
7 (1) to 17 (18) (see FIG. 2) are lit up and displayed in a graph format (step S2).

When the subtraction operator is input by operating the "-" key 34b following the operand (A term) "48 and 3/10", the operator designation code "010" is stored in the RAM.
25 is set in the F register 40 (step S
3).

Here, when the operation number (B term) "27 and 5/7" is input again using the ten-key 33, the "and" key 31, and the "minute" key 32 in the key input unit 22,
The integer "27", the denominator "7", and the numerator "5" are stored in the Y register 38 (step S4).

Then, the subtraction operator and the operation number (B
The term) is displayed on the expression display unit 26 as the operand "48/3".
"/ 10" is followed by "-" and "27/5/7" in a numerical format. In addition, as shown in FIG.
For 7, the subtraction operator "-" is displayed on the operator display 12.
Is lit up, and "20" of the numerical segment 14 and seven circular segments 15 in the second display area 11b are lit up, and "" of the pie chart display body 16 is displayed based on the pie chart display table stored in advance in the ROM 23. 5 /
Forty-three radial segments 17 (1) to 17 (43) (see FIG. 2) corresponding to 7 (about 0.71) "are turned on and displayed in a graph format (step S5).

When the "=" key 35 in the key input section 22 is operated, the X register 37, Y of the RAM 25 is operated.
According to the operand “48/3/10”, the operand “27/5/7”, and the operator designation code “010” stored in the register 38 and the F register 40, the arithmetic part 24 performs fractional subtraction arithmetic processing. Executed, the subtraction operation result “20 and 41/70”, the integer “20”, the denominator “70”,
The number of molecules “41” is stored in the Z register 39 (steps S6 and S7).

Then, the equal sign and the subtraction operation result are displayed on the expression display unit 26 in the numerical format such as "=""20/41/70" following the operation number "27/5/7". It Further, as shown in FIG. 6, the equal sign “=” is lit and displayed on the equal sign display body 13 on the graph display unit 27,
“20” of the numerical value segment 14 in the third display area 11c is turned on, and the pie chart display 1 is based on the pie chart display table stored in the ROM 23 in advance.
Sixty-six radial segments 17 (1) to 17 (36) (see FIG. 2) corresponding to "41/70 (about 0.59)" of No. 6 are turned on and displayed in a graph format (step S8).

FIG. 7 is a diagram showing a graph display state associated with the fractional multiplication calculation process in the pie chart display mode of the electronic computer having the fraction calculation function. That is, the RAM 25 is operated by operating the graph key 30 in the key input unit 22.
"1" is set in the G register 41 of the CPU 21 and the CPU 21 is set to the pie chart display mode.
3, using the "to" key 31 and "minute" key 32 to input the operand (A term) "3 and 3/7", the integer "3", denominator "7", numerator The number "3" is stored in the X register 37 (step S1).

Then, the operand (A term) is displayed on the expression display unit 26 in a numerical format such as "3/3/7". Further, as shown in FIG. 7, for the graph display unit 27, three circular segments 15 in the first display area 11a are turned on, and a pie chart is stored based on a pie chart display table stored in advance in the ROM 23. Twenty-six radial segments 17 (1) to 17 (26) (see FIG. 2) corresponding to "3/7 (about 0.43)" of the display body 16 are turned on and displayed in a graph format (step S2). ).

When the multiplication operator is input by operating the "x" key 34c following the operand (A term) "3 and 3/7", the operator designation code "011" is F of the RAM 25. It is set in the register 40 (step S3).

Here, when the operation number (term B) "5 and 5/6" is input again using the ten-key 33, the "and" key 31, and the "minute" key 32 in the key input unit 22, The integer "5", the denominator "6", and the numerator "5" are stored in the Y register 38 (step S4).

Then, the multiplication operator and the operation number (B
The term) indicates to the expression display unit 26 that the operand “3/3 /
"7", followed by "x" and "5/5/6" are displayed in numerical form. Further, as shown in FIG. 7, on the graph display unit 27, the multiplication operator “x” is lit and displayed on the operator display body 12, and five circular segments 15 in the second display area 11b are lit. In addition, 50 radial segments 17 (1) to 17 (50) corresponding to "5/6 (about 0.83)" of the pie chart display 16 are stored based on the pie chart display table stored in the ROM 23 in advance. (See FIG. 2) is turned on and is displayed in a graph format (step S5).

When the "=" key 35 in the key input unit 22 is operated, the X register 37, Y of the RAM 25 is operated.
According to the operand “3/3/7”, the operand “5/5/6”, and the operator designation code “011” stored in the register 38 and the F register 40, the arithmetic unit 24 performs the fractional multiplication arithmetic processing. It is executed, and the integer "15", the denominator "14", and the numerator "5", which are the multiplication operation results "15 and 5/14", are stored in the Z register 39 (steps S6 and S7).

Then, the equal sign and the multiplication operation result are displayed on the expression display unit 26 in the numerical form such as "=""15/5/14" following the operation number "5/5/6". It Further, as shown in FIG. 7, for the graph display unit 27,
The equal sign “=” is lit on the equal sign display body 13, and “10” of the numerical value segment 14 in the third display area 11c is displayed.
And 5 circular segments 15 are lit, and RO
"5/14 (about 0.36)" of the pie chart display 16 based on the pie chart display table stored in advance in M23
21 radial segments 17 (1) to 17 (2 corresponding to
1) (see FIG. 2) is turned on and displayed in a graph format (step S8).

FIG. 8 is a diagram showing a graph display state accompanying the fractional division calculation processing in the pie graph display mode of the electronic computer having the fraction calculation function. That is, the RAM 25 is operated by operating the graph key 30 in the key input unit 22.
"1" is set in the G register 41 of the CPU 21 and the CPU 21 is set to the pie chart display mode.
3. When the operand (A term) "4 and 4/5" is input using the "to" key 31 and the "minute" key 32, the integer "4", denominator "5", numerator The number "4" is stored in the X register 37 (step S1).

Then, the aforesaid operand (A term) is displayed on the expression display unit 26 in a numerical format such as "4/4/5". Further, as shown in FIG. 8, for the graph display unit 27, four circular segments 15 in the first display area 11a are turned on, and based on the pie graph display table stored in the ROM 23 in advance, the pie graph is displayed. Forty-eight radial segments 17 (1) to 17 (48) (see FIG. 2) corresponding to "4/5 (0.8)" of the display body 16 are turned on and displayed in a graph format (step S2). .

Following the above operand (A term) "4 and 4/5", when the "÷" key 34d is operated to input the division operator, the operator designation code "100" is F of the RAM 25. It is set in the register 40 (step S3).

Here, when the number of operations (B term) "2 and 2/3" is input again using the ten key 33, the "and" key 31, and the "minute" key 32 in the key input unit 22, The integer "2", the denominator "3", and the numerator "2" are stored in the Y register 38 (step S4).

Then, the division operator and the operation number (B
The term) indicates to the expression display unit 26 that the operand “4/4 /
After "5", "÷" and "2/2/3" are displayed in numerical form. In addition, as shown in FIG. 8, the division operator “÷” is lit and displayed on the operator display body 12 on the graph display unit 27, and two circular segments 15 in the second display area 11b are lit. In addition, 40 radial segments 17 (1) to 17 (40) corresponding to "2/3 (about 0.67)" of the pie chart display 16 are stored based on the pie chart display table stored in advance in the ROM 23. (See FIG. 2) is turned on and is displayed in a graph format (step S5).

When the "=" key 35 in the key input section 22 is operated, the X register 37, Y of the RAM 25 is operated.
According to the operands “4/4/5”, the operand “2/2/3”, and the operator designation code “100” stored in the register 38 and the F register 40, the arithmetic division 24 performs fractional division arithmetic processing. It is executed and the integer "2", the denominator "5", and the numerator "2", which are the division operation results "2 and 2/5", are stored in the Z register 39 (step S6).
S7).

Then, the equal sign and the division operation result are displayed on the expression display unit 26 in the numerical format such as "=" and "2/2/5" following the operation number "2/2/3". It Also,
As shown in FIG. 8, the equal sign “=” is displayed on the equal sign display body 13 on the graph display unit 27, and two circular segments 15 in the third display area 11c are turned on. Based on the pie chart display table stored in advance in the ROM 23, the pie chart display body 16 displays “2/5 (0.
4) ”corresponding to 24 radial segments 17 (1)
17 (24) (see FIG. 2) is lit up and displayed in a graph format (step S8).

Therefore, according to the electronic computer having the above-described fractional calculation function, the integer value and the fractional numerical value input as the operands are the numerical value segment (the tens digit) 14 and the circular shape in the first display area 11a. The integer value and fractional value displayed as the segment (one's place) 15 and the pie chart display body 16 (fractional) having the radial segment and inputted as the operation number are the numeric segment (ten's place) in the second display area 11b. ) 14, circular segment (one's place)
Pie chart display 1 having 15 and radial segments
6 (fractional number) is displayed, and the integer value and the fractional numerical value which are the calculation results are the numerical value segment (10's place) 14 and the circular segment (1's place) in the third display area 11c.
Pie chart display 1 having 15 and radial segments
Displayed in 6 (fractional), the first and second display areas 11
Since the operator display body 12 is provided between a and 11b and the equal sign display body 13 is provided between the second and third display areas 11b and 11c, especially children who have not received fractional education or children who have not received fractional education , It is easy to understand what that fractional value specifically means, that is, for example, about 1/3, it means that it is one of three parts,
It can be effectively used as a teaching material for fractional education.

[0050]

As described above, according to the present invention, as a display means for displaying the input fractional formula and the calculation result, for example, a circular graph-shaped display body composed of a plurality of radial segments in a substantially circular shape is used. Since the concrete contents of the fractional values are expressed by configuring the liquid crystal display means or the like, it becomes possible for a child who receives fractional education to easily understand the principle of fractional calculation.

[Brief description of drawings]

FIG. 1 is an external view showing a configuration of a graph display unit of an electronic computer having a fractional calculation function according to an embodiment of the present invention.

FIG. 2 is an external view showing a configuration of a pie chart display body in a graph display unit of an electronic computer having the fraction calculation function.

FIG. 3 is a block diagram showing a circuit configuration of an electronic calculator having the fraction calculation function.

FIG. 4 is a flowchart showing a calculation display process in a pie chart display mode of the electronic calculator having the fraction calculation function.

FIG. 5 is a diagram showing a graph display state associated with a fractional addition calculation process in a pie graph display mode of the electronic computer having the fraction calculation function.

FIG. 6 is a diagram showing a graph display state associated with a fractional subtraction calculation process in a pie graph display mode of the electronic computer having the fraction calculation function.

FIG. 7 is a diagram showing a graph display state associated with a fractional multiplication calculation process in the pie chart display mode of the electronic computer having the fraction calculation function.

FIG. 8 is a diagram showing a graph display state associated with a fractional division calculation process in a pie graph display mode of the electronic computer having the fraction calculation function.

[Explanation of symbols]

11a ... 1st display area, 11b ... 2nd display area, 1
1c ... 3rd display area, 12 ... Operator display, 13 ... Equal sign display, 14 ... Numerical segment, 15 ... Circular segment, 16 ... Pie graph display, 17 (1) to 17 (60) ... Radial segment , 18 ... Scale segment, 21 ... CPU
(Central processing unit), 22 ... Key input section, 23 ... ROM,
24 ... Arithmetic unit, 25 ... RAM, 26 ... Formula display unit, 27 ...
Graph display unit, 28 ... Expression display control unit, 29 ... Graph display control unit, 30 ... Graph key, 31 ... "and" key, 32 ...
"Minute" key, 33 ... Numeric keypad, 34a ... "+" key,
34b ... "-" key, 34c ... "x" key, 34d ...
"÷" key, 35 ... "=" key, 36 ... "AC" key,
37 ... X register, 38 ... Y register, 39 ... Z register, 40 ... F register, 41 ... G register.

Claims (2)

[Claims] 1. An electronic computer having a fractional calculation function, comprising: a display unit for displaying the inputted fractional expression and its calculation result in the form of a graph. 2. The display means for displaying the inputted fractional expression and its calculation result in the form of a graph comprises liquid crystal display means each of which is composed of a display body having a substantially circular shape with a plurality of radial segments. Claim 1 characterized by the above-mentioned.
Electronic calculator described.