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Fun / Mixed

Level 15 / build-up

Teen mul/div (basic)

3 visual steps / window product

1. Window scan

13 x 171. Window scanHold the raw window totals.110 x 17 = 17023 x 17 = 513answer 221
Hold the raw window totals.

Hold the raw window totals.

2. Normalize

13 x 172. NormalizeKeep 1s; extra carry moves left.110 x 17 = 17023 x 17 = 513answer 221
Keep 1s; extra carry moves left.

Keep 1s; extra carry moves left.

3. Check

13 x 173. CheckRe-read the expression for skipped operations.110 x 17 = 17023 x 17 = 513answer 221
Re-read the expression for skipped operations.

Re-read the expression for skipped operations.

Practice Level 15

Use the visible move, then type only when the answer is clear.

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