Share Addition/Subtraction to 20
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8 + 7
15
15 - 9
6
6 + 9
15
14 - 6
8
10 + 5
15
18 - 7
11
9 + 4
13
13 - 8
5
7 + 6
13
16 - 9
7
5 + 8
13
12 - 7
5
4 + 9
3
17 - 8
9
3 + 7
10
11 - 5
6
