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7 + 5 =
12
8 + 9 =
17
6 + 4 =
10
3 + 2 =
5
9 + 6 =
15
10 + 8 =
18
5 + 7 =
12
2 + 9 =
11
4 + 11 =
15
13 + 6 =
19
1 + 5 =
6
8 + 3 =
11
15 − 6 =
9
18 − 9 =
9
14 − 5 =
9
10 − 4 =
6
