Little beads. Big thinking.

Use your abacus to work down each column. Type the total when you’re ready.

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Practice technique

How does this technique work?

Work down each column using the running total. A question may include direct steps as well as the selected technique. “Small” and “Big” describe the friend formulas—not the size of the answer.

Digits in each number

Rows per question2–100 numbers in each column

Practice type

Number of questions

Timing (optional)No running clock is shown while you practice — just a quiet Pause, and your time at the end.

For a 1-upper / 4-lower bead abacus. Mixed practice never goes below zero. Changing technique creates a fresh sheet and clears its answers. For other settings, tap New practice.

Your practice sheet

Beads move as you type an answer ✨

0 of 0 answered

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Profiles

Practice history

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Little beads. Big thinking.

Your practice sheet