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Multiplication

Level 24 / mastery

3d x 3d (full range)

6 visual steps / multi-digit window train

1. Left Edge

1. Left Edge
 raw windows
8x7 = 56. Carry waits for settle.

8x7 = 56. Carry waits for settle.

2. Left Cross

2. Left Cross
 raw windows
8x3 + 5x7 = 59. Carry waits for settle.

8x3 + 5x7 = 59. Carry waits for settle.

3. Center Stack

3. Center Stack
 raw windows
8x4 + 5x3 + 6x7 = 89. Carry waits for settle.

8x4 + 5x3 + 6x7 = 89. Carry waits for settle.

4. Right Cross

4. Right Cross
 raw windows
5x4 + 6x3 = 38. Carry waits for settle.

5x4 + 6x3 = 38. Carry waits for settle.

5. Right Edge

5. Right Edge
 raw windows
6x4 = 24. Carry waits for settle.

6x4 = 24. Carry waits for settle.

6. Settle strip

6. Settle strip
Settle onceRaw windows keep ones; extra carry moves left.raw windows
settled strip
56 | 59 | 89 | 38 | 24 -> 628304.

56 | 59 | 89 | 38 | 24 -> 628304.

Practice Level 24

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

Start Level