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Multiplication

Level 23 / realistic untimed

3d x 3d (large h and u)

6 visual steps / multi-digit window train

1. Left Edge

1. Left Edge
 raw windows
7x8 = 56. Carry waits for settle.

7x8 = 56. Carry waits for settle.

2. Left Cross

2. Left Cross
 raw windows
7x6 + 8x8 = 106. Carry waits for settle.

7x6 + 8x8 = 106. Carry waits for settle.

3. Center Stack

3. Center Stack
 raw windows
7x7 + 8x6 + 9x8 = 169. Carry waits for settle.

7x7 + 8x6 + 9x8 = 169. Carry waits for settle.

4. Right Cross

4. Right Cross
 raw windows
8x7 + 9x6 = 110. Carry waits for settle.

8x7 + 9x6 = 110. Carry waits for settle.

5. Right Edge

5. Right Edge
 raw windows
9x7 = 63. Carry waits for settle.

9x7 = 63. Carry waits for settle.

6. Settle strip

6. Settle strip
Settle onceRaw windows keep ones; extra carry moves left.raw windows
settled strip
56 | 106 | 169 | 110 | 63 -> 684063.

56 | 106 | 169 | 110 | 63 -> 684063.

Practice Level 23

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

Start Level