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1.18 - 6 =
2.6 + 12 =
3.2 + 3 =
4.11 - 5 =
5.6 - 4 =
6.5 + 3 =
7.20 - 18 =
8.19 - 5 =
9.15 - 14 =
10.3 + 12 =
11.4 - 1 =
12.12 - 3 =
13.14 - 5 =
14.6 + 3 =
15.2 + 9 =
16.1 + 6 =
17.7 + 2 =
18.10 + 8 =
19.6 - 5 =
20.14 - 3 =