Skip to content

Learn

Multiplication

Level 20 / build-up

3d x 3d (mixed mastery)

6 visual steps / multi-digit window train

1. Left Edge

1. Left Edge
raw windows
6x5 = 30. Carry waits for settle.

6x5 = 30. Carry waits for settle.

2. Left Cross

2. Left Cross
raw windows
6x3 + 4x5 = 38. Carry waits for settle.

6x3 + 4x5 = 38. Carry waits for settle.

3. Center Stack

3. Center Stack
raw windows
6x6 + 4x3 + 2x5 = 58. Carry waits for settle.

6x6 + 4x3 + 2x5 = 58. Carry waits for settle.

4. Right Cross

4. Right Cross
raw windows
4x6 + 2x3 = 30. Carry waits for settle.

4x6 + 2x3 = 30. Carry waits for settle.

5. Right Edge

5. Right Edge
raw windows
2x6 = 12. Carry waits for settle.

2x6 = 12. Carry waits for settle.

6. Settle strip

6. Settle strip
Settle onceRaw windows keep ones; extra carry moves left.raw windows
settled strip
30 | 38 | 58 | 30 | 12 -> 344112.

30 | 38 | 58 | 30 | 12 -> 344112.

Practice Level 20

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

Start Level