Journal I

        I’m going to tell you about how to use soroban. Do you know soroban? It’s called “abacus” in English. Soroban is Japanese traditional and manual calculator. The reason why I know how to use soroban, I learn it before. Soroban has a lot of bead. Vertical line has five beads. Upper one beat mean five and under each beats mean one. There is a partition between upper beat and under beat, and every four vertical line, dot on a partition. First dot is the one’s place, and next dot is the thousand’s place. Good point of soroban is decided one’s place or other place by me. It is so difficult to calculation by soroban, so I going to give you a particular account of it. For example, if you want to calculate 4＋5, put all under base and upper base. It’s show 9. if you want to 5＋6 ,first, put upper base next, put one under base and clear upper base then, put one under base in the ten’s place. It’s show 11. If it goes to next place, carry the figure of small place to large place. If you want to calculate 16 ×13, put answer of 6×1 in the ten’s place and answer of 6×3 in the ten and one’s place. Then put answer of 1×1 in the hundred’s place and answer of 1×3 in the ten’s place. It’s show 207. If you want to calculate 126 ÷6, you should put 126 from the beginning, put answer of 12 ÷6 in other place and clear 12. Then put answer of 6÷6 and clear 6. It’s show 11. Do you understand how to use soroban and calculation?  It is so difficult at first, but surely help you for example, go shopping and calculate the price.