4 + 4 = ..., 9 − 9 = ..., 6 + 1 = ..., 10 − 9 = ..., 5 + 4 = ..., 8 − 6 = ..., 7 + 3 = ..., 6 − 3 = ..., 2 + 2 = ..., 9 − 4 = ..., 3 + 3 = ..., 10 − 10 = ..., 1 + 1 = ..., 8 − 3 = ..., 4 + 6 = ...

Solve the problems.

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