Addition Table Check

1 + 8 = 9
1 + 4 = 5
1 + 2 = 3
1 + 1 = 2
1 + 5 = 6
1 + 10 = 11
1 + 7 = 8
1 + 6 = 7
1 + 3 = 4
1 + 9 = 10
Tests to test the knowledge of addition within 20

Addition and subtraction within 10, 20 and 100

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