そろばん
Abacus Alive — Interactive Japanese Soroban
Welcome · 8 seconds
Meet the soroban
Watch the beads come alive, then learn the parts, read your first number, and make your first addition.
Start lesson oneFive quick lessons
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LESSON 01
Parts of a soroban
Meet the frame, rods, beam, and the two kinds of beads.
Read lesson LESSON 02Reading numbers
Turn bead positions into digits, place values, and decimals.
Read lesson LESSON 03Addition basics
Make direct moves, then learn the friends of 5 and 10.
Read lesson LESSON 04Subtraction basics
Take away directly, then use complements to borrow.
Read lesson LESSON 05Multiplication basics
Build equal groups and combine place-value products.
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Interactive abacus
Decimal places
000000000
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Explain steps
- Set a number, pick an operation, set the second number, then press equals to see every carry and borrow explained rod by rod.