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Math Gym
Multiplication Guide

Multiplication Level 21: 3d x 3d (medium all). multi-digit window train.

1. Left Edge

1. Left Edge
Use the highlighted left edge pair.
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Use the highlighted left edge pair. Carry waits for settle.

2. Left Cross

2. Left Cross
Add both highlighted pairs.
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Add both highlighted pairs. Carry waits for settle.

3. Center Stack

3. Center Stack
Add all 3 highlighted pairs.
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Add all 3 highlighted pairs. Carry waits for settle.

4. Right Cross

4. Right Cross
Add both highlighted pairs.
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Add both highlighted pairs. Carry waits for settle.

5. Right Edge

5. Right Edge
Use the highlighted right edge pair.
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Use the highlighted right edge pair. Carry waits for settle.

6. Settle strip

6. Settle strip
Settle once.
Keep ones; carry moves left.raw windows
settled strip
16 | 40 | 73 | 60 | 36 -> 207936.