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Addition

Add numbers by filling left-to-right answer windows, then settling carry once.

Fill raw windows left-to-right; settle carry after the strip is visible.

Level Guides

30 level-fit visual guides.

Level 1 visual plan for 1-digit + 1-digit

Level 1 / foundation

1-digit + 1-digit

1 visual step

Level 2 visual plan for 2d + 1d (no carry)

Level 2 / foundation

2d + 1d (no carry)

2 visual steps

Level 3 visual plan for 2d + 1d (with carry)

Level 3 / realistic untimed

2d + 1d (with carry)

3 visual steps

Level 4 visual plan for Mixed 1d/2d + 1d

Level 4 / foundation

Mixed 1d/2d + 1d

3 visual steps

Level 5 visual plan for 2d + 1d (sum < 100)

Level 5 / foundation

2d + 1d (sum < 100)

3 visual steps

Level 6 visual plan for 2d + 2d (no carry)

Level 6 / foundation

2d + 2d (no carry)

2 visual steps

Level 7 visual plan for 2d + 2d (ones carry)

Level 7 / foundation

2d + 2d (ones carry)

3 visual steps

Level 8 visual plan for 2d + 2d (both carry)

Level 8 / realistic untimed

2d + 2d (both carry)

3 visual steps

Level 9 visual plan for 2d + 2d (any)

Level 9 / foundation

2d + 2d (any)

3 visual steps

Level 10 visual plan for 2d + 2d (mastery)

Level 10 / foundation

2d + 2d (mastery)

3 visual steps

Level 11 visual plan for 3d + 2d (no carry)

Level 11 / build-up

3d + 2d (no carry)

3 visual steps

Level 12 visual plan for 3d + 2d (ones carry)

Level 12 / build-up

3d + 2d (ones carry)

4 visual steps

Level 13 visual plan for 3d + 2d (both carry)

Level 13 / realistic untimed

3d + 2d (both carry)

4 visual steps

Level 14 visual plan for 3d + 2d (any)

Level 14 / build-up

3d + 2d (any)

4 visual steps

Level 15 visual plan for 3d + 2d (mastery)

Level 15 / build-up

3d + 2d (mastery)

4 visual steps

Level 16 visual plan for 3d + 3d (no carry)

Level 16 / build-up

3d + 3d (no carry)

4 visual steps

Level 17 visual plan for 3d + 3d (ones carry)

Level 17 / build-up

3d + 3d (ones carry)

4 visual steps

Level 18 visual plan for 3d + 3d (overflow)

Level 18 / realistic untimed

3d + 3d (overflow)

4 visual steps

Level 19 visual plan for 3d + 3d (any)

Level 19 / build-up

3d + 3d (any)

4 visual steps

Level 20 visual plan for 3d + 3d (mastery)

Level 20 / build-up

3d + 3d (mastery)

4 visual steps

Level 21 visual plan for 4d + 3d (no carry)

Level 21 / mastery

4d + 3d (no carry)

5 visual steps

Level 22 visual plan for 4d + 3d (ones carry)

Level 22 / mastery

4d + 3d (ones carry)

5 visual steps

Level 23 visual plan for 4d + 3d (overflow)

Level 23 / realistic untimed

4d + 3d (overflow)

5 visual steps

Level 24 visual plan for 4d + 3d (any)

Level 24 / mastery

4d + 3d (any)

5 visual steps

Level 25 visual plan for 4d + 3d (mastery)

Level 25 / mastery

4d + 3d (mastery)

5 visual steps

Level 26 visual plan for 4d + 4d (no carry)

Level 26 / mastery

4d + 4d (no carry)

5 visual steps

Level 27 visual plan for 4d + 4d (ones carry)

Level 27 / mastery

4d + 4d (ones carry)

5 visual steps

Level 28 visual plan for 4d + 4d (overflow)

Level 28 / realistic untimed

4d + 4d (overflow)

5 visual steps

Level 29 visual plan for 4d + 4d (any)

Level 29 / mastery

4d + 4d (any)

5 visual steps

Level 30 visual plan for 4d + 4d (mastery)

Level 30 / mastery

4d + 4d (mastery)

5 visual steps

Practice this category

Use the method on live addition levels.

Open Addition Workouts