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Addition

Level 2 / foundation

2d + 1d (no carry)

2 visual steps / answer-window addition

1. Fill tens

Step 1: Fill tens
raw windows
running strip
Tens window: 4 + 0 = 4. Release 4.

Tens window: 4 + 0 = 4. Release 4.

2. Fill ones

Step 2: Fill ones
raw windows
running strip
Ones window: 2 + 6 = 8. Release 8.

Ones window: 2 + 6 = 8. Release 8.

Practice Level 2

A few quick rounds make digit release automatic; carry is the only thing to keep.

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