10 引きの計算方法: Mastering the Fundamentals of Japanese Abacus Calculation
In Japan, the abacus, also known as "soroban," has been an essential tool for calculations for centuries. The ability to perform rapid and accurate calculations using the abacus is a valuable skill, and in this article, we will explore the 10 types of calculations that form the foundation of Japanese abacus calculation methods.
1. Basic Addition (足し算: Ashi-zan)
The most fundamental calculation method in Japanese abacus calculation, basic addition involves adding numbers together. This is the foundation of all other calculation methods.
2. Basic Subtraction (引き算: Hiki-zan)
The next essential calculation method, basic subtraction involves subtracting one number from another.
3. Multiplication by a Single Digit (個位の掛け算: Koui no Kake-zan)
This method involves multiplying a number by a single-digit multiplier.
4. Multiplication by a Two-Digit Number (十位の掛け算: Juu-i no Kake-zan)
In this method, a number is multiplied by a two-digit multiplier.
5. Division by a Single Digit (個位の割り算: Koui no Wari-zan)
This method involves dividing a number by a single-digit divisor.
6. Division by a Two-Digit Number (十位の割り算: Juu-i no Wari-zan)
In this method, a number is divided by a two-digit divisor.
7. Calculating 1/2 and 1/4 (半分と四分の一の計算: Hanbun to Yon-bun no Keisan)
This method involves calculating fractions, specifically 1/2 and 1/4.
8. Calculating 1/3 and 2/3 (三分の一と二分の三の計算: San-bun no Ichi to Ni-bun no San no Keisan)
This method involves calculating fractions, specifically 1/3 and 2/3.
9. Calculating 3/4 and 1/5 (三分の四と五分の一の計算: San-bun no Yon to Go-bun no Ichi no Keisan)
This method involves calculating fractions, specifically 3/4 and 1/5.
10. Calculating Complex Fractions (複雑な分数の計算: Fukuzatsu na Bunsu no Keisan)
The final method involves calculating complex fractions, combining multiple fractions into a single calculation.
Mastering these 10 calculation methods will provide a solid foundation in Japanese abacus calculation. With practice and dedication, you can develop the skills and speed necessary to become proficient in soroban calculation.
