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1.19 - 18 =
2.4 - 2 =
3.5 + 3 =
4.6 + 9 =
5.2 + 16 =
6.1 + 18 =
7.4 - 2 =
8.2 - 1 =
9.12 - 11 =
10.2 + 6 =
11.3 + 1 =
12.2 + 12 =
13.11 - 2 =
14.7 + 6 =
15.5 + 11 =
16.5 - 4 =
17.5 + 7 =
18.7 - 4 =
19.4 - 1 =
20.15 - 10 =