1. Parts of the SOROBAN
Introduce the various parts of the SOROBAN as below.
2. SOROBAN-Related Words in English
| English | Japanese |
| Rod(s) | Soroban no Keta |
| One bead | Soroban no ichidama |
| Five beads | Soroban no godama |
| Center bar | Soroban no hari |
| Unit point | Soroban no teiiten |
| One’s place Ichinokurai | Ichinokurai |
| Ten’s place | Junokurai |
| Hundred’s place | Hyakunokurai |
| Thousand’s place | Sennokurai |
| Add (3+2=5) | Tasu(Three add two = five) |
| Subtract (7-3=4) | Hiku(Seven subtract three = four) |
| Multiply(2×2=4) | Kakezan(Two time two = four) |
| Divide (4÷2=2) | Warizan(Four divided by two = two) |
| Sums | Mirorizan |
3. How to form number?
Numbers are formed by moving counters towards the bar.
Numbers from 1 to 10 are shown below.
- One (1)
- Two (2)
- Three (3)
- Four (4)
- Five (5)
- Six (6)
- Seven (7)
- Eight (8)
- Nine (9)
- Ten (10)
- Hundred (100)
- Thousand (1000)
- Twenty-eight (28)
- Three hundred seventy-five (375)
- Four thousand fifty-six (4056)
4. Introductions
- Before beginning, you must see that the SOROBAN is set Zero. (Push all beads Zero)
- You can do this be slanting your SOROBAN towards you which will down all the counters.
- We clear the SOROBAN by moving all the counters away from the center line.
- We are going to use our index finger.