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Multiplication

Level 18 / realistic untimed

3d x 3d (medium hundreds)

6 visual steps / multi-digit window train

1. Left Edge

1. Left Edge
 raw windows
4x2 = 8. Raw fits.

4x2 = 8. Raw fits.

2. Left Cross

2. Left Cross
 raw windows
4x3 + 3x2 = 18. Carry waits for settle.

4x3 + 3x2 = 18. Carry waits for settle.

3. Center Stack

3. Center Stack
 raw windows
4x5 + 3x3 + 1x2 = 31. Carry waits for settle.

4x5 + 3x3 + 1x2 = 31. Carry waits for settle.

4. Right Cross

4. Right Cross
 raw windows
3x5 + 1x3 = 18. Carry waits for settle.

3x5 + 1x3 = 18. Carry waits for settle.

5. Right Edge

5. Right Edge
 raw windows
1x5 = 5. Raw fits.

1x5 = 5. Raw fits.

6. Settle strip

6. Settle strip
Settle onceRaw windows keep ones; extra carry moves left.raw windows
settled strip
8 | 18 | 31 | 18 | 5 -> 101285.

8 | 18 | 31 | 18 | 5 -> 101285.

Practice Level 18

A few quick rounds make the train automatic; each raw window keeps one digit.

Start Level