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Addition and subtraction

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. Calculate:

7 + 2 =

6 + 3 =

6 + 2 =

1 + 4 =

6 + 1 =

5 + 3 =

3 + 3 =

4 + 2 =

5 + 3 =

3 + 7 =



Calculate:

9 - 2 =

6 - 3 =

10 - 4 =

7 - 3 =

5 - 2 =

8 - 3 =

5 - 4 =

10 - 7 =

5 - 3 =

7 - 3 =



3. Calculate:

3 + 2 + 3 =

6 + 2 + 1 =

1 + 3 + 6 =

1 + 1 + 5 =

5 - 2 - 1 =

3 + 1 - 4 =

5 - 3 + 2 =

4 - 2 + 6 =