Abacus Level 9 · free

Abacus Level 9: Mental abacus

Flash sums in your head. Look at each number, move the beads in your mind, and keep the picture. Start slowly; speed comes with daily practice.

What you’ll learn

▶ Watch it on the abacus

Watch 34, then +25, then −12: the picture in your mind goes 34 → 59 → 47.

Abacus: 0

✏️ Practice

Work the sum on the abacus and press Check (or type the answer). Stuck? “Show me how”.

Abacus: 0 ·

Right: 0 · Tried: 0

🏁 Level 9 test

20 sums. Work each sum on the abacus, press Check, then go to the next one. Get 16 or more right to pass the level.

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🖨️ Level 9 worksheets

✨ Free AI tutor

Ask the AI tutor about Level 9

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