そろばん
Abacus Alive
Current value
0
Decimal places
0
1
2
0
0
0
0
0
0
0
0
0
Practice mode
Type a number — the beads follow
+
-
×
÷
Equals
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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.