JPS6327219Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention completely changes the format of the conventional soroban, and simultaneously displays the price and change, or the money spent and the remaining amount in numbers, and also has a transparent lid that also serves as a stopper, so that it can be used in the middle of calculations. This is about Soroban, which allows you to maintain the state as it is.
Conventional Sorobans did not have anything that could simultaneously represent the price and change, or the money spent and the remaining money, in numbers. According to the literature, there is a Russian-style soroban with 10 balls for each digit, but even if such a soroban is used, it is not possible to perform convenient calculations like the one proposed here. Also, even if each digit is made up of 9 balls, the proposed method cannot be achieved.

Looking at the publications, there were various ways to express calculated values in numbers, but none that used fractions.

In this proposal, in order to be able to simultaneously represent the price and change, or the money spent and the balance, the composition of the Soroban is 10 yen coins for the first digit, 9 coins for the second and above digits, and a Soroban axis substitute. Fractions are written in the slide frame.

To explain this proposal with drawings, there are 5 slide balls (hereinafter simply referred to as balls) that are substituted for Soroban balls, and 2 and 3 slide frames that are substituted for Soroban shafts (Figure 2 is 2
It is a solo van like the one shown in Fig. 1, which is made by combining the slide frame fixing angle (Fig. 6), and the positioning indicator/blank board (Fig. 7). The numerator of the fraction written in the slide frame represents the number of balls at the top, and the denominator represents the number of balls at the bottom. Each ball in Figure 1 does not have a protrusion, but the actual ball has a protrusion as shown in Figure 5.
The size of the jade fruit size is shown in Figure 4 (protrusions omitted). The balls at the top are marked with a ● mark, and the balls at the bottom are marked with a ■ mark, but this is to make it easier to count the number of balls.

This solo ban is 10 for all 1-digit balls, 100 for all 1-2 digit balls, 1,000 for all 1-3 digit balls, so 1-5
All of the digit balls are designed to represent 100,000.

In the case of calculation by hand, subtracting 13527 from 100,000 is 100000 9999 ○I −13527 −13527 86473 86473 ○A is a pain to calculate, while ○B is easy. This proposal applies this calculation method. To do this calculation in this Soroban, put down all the balls, use the denominator to represent 9999, and put 13527 on top. Then the numerator is 13527 and the denominator is
Represents 86473. (Refer to reference book ab) In this case, when the numerator and denominator are one-digit calculations, they are each a complement to 10, when two-digit calculations, they are complements to hundreds, and when three-digit calculations, they are complements to thousands. Therefore, in 5-digit calculations, both numbers are complements of 100,000.

For this reason, when the minuend is 10 to the nth power, the amount paid and the change, or the money spent and the remaining amount, can be expressed numerically at the same time. (If the minuend is 10 to the nth power, calculations are easy whether it's billions or trillions.) Usage 1: When doing ordinary addition.

Do it the same way as a traditional solo bang.

2 When doing ordinary subtraction.

Do it the same way as a traditional solo bang.

3. When you want to do subtraction as easily as addition.

Simply express the minuend as a denominator, and then move the minuend upward. (The answer in this case is expressed in the denominator.) 3. When you have 10 to the nth power, spend money, and want to know the amount spent and the remaining amount at the same time.

For example, if you have 100,000 yen and spend it.

Γ Express the money you have as 9999 in the denominator (all balls with 5 digits or less are at the bottom) Γ If you add up the money one by one (while raising the balls), the amount spent will be shown in the numerator. The remaining amount is calculated as the denominator.

4 When selling things Γ Put all the balls down.

Γ The money is spent one after another. (while raising the ball) Then the price will be shown in the numerator, and the change will be shown in the denominator.

However, this is only when the customer gives money equal to 10 to the nth power. If the other person is willing to give you half the money, for example, if you gave them 500 yen for a 365 yen bill, you should give them back 500 yen less than the change you received when they gave you 1,000 yen.
(You can easily find out the change for 1,000 yen with this solo bar.

effect 1 Calculations can be made faster than conventional Soroban.

The calculation time is faster because the number of calculations is about 20% less than that of conventional Soroban.

2. I can easily do subtraction.

Subtraction is troublesome because it requires carrying down, but this Soroban makes calculations easy because it can be subtracted in the same way as addition.

3. In some calculations, addition and subtraction are performed simultaneously and in parallel.

When the minuend is 10 to the power of n, the money spent and the money left appear at the same time, because addition and subtraction are performed at the same time.

4. Develop mental arithmetic skills.

The shape of this soroban is easy to remember, so you can improve your mental arithmetic skills.

5. Even if you don't look at your wallet, you can tell how much money you have left by looking at this soroban. The lid is transparent, so you can see it without opening it.

[Brief explanation of drawings]

Figure 1 is a perspective view of this Soroban, Figure 2 is a slide frame for Soroban shaft (for 2nd digit and above), Figure 3 is a slide frame for Soroban shaft (for 1st digit), Figure 4 is for Soroban ball substitute. Slide ball (protrusions omitted), Fig. 5 is a slide ball of fruit size (enlarged view), Fig. 6 is an angle for fixing the slide frame, Fig. 7 is a positioning indicator and blind plate, Fig. 8 is a lid that also serves as a stopper, Fig. 9 is a lid that also serves as a stopper. A table showing the arrangement of fractions in the slide frame.

Claims (1)

[Scope of claim for utility model registration] 1. The number of balls in the first digit is 10, and the number of balls in the second digit and above is 9.
A solo band that is made individually. 2. The soroban according to claim 1, wherein the soroban axis is a sliding frame containing fractions. 3 Utility model registration claim 1, in which the Soroban ball is a grooved slide plate with protrusions
Soroban as described in section. 4. The soroban according to claim 1, wherein the lid of the soroban is transparent and also serves as a ball stopper.