Missing Addends (Fill in the Gap)

Solve the addition problems below.

1) Solve
10+_=
2) Solve
34+_=
3) Solve
13+_=
4) Solve
13+_=
5) Solve
37+_=
6) Solve
23+_=
7) Solve
25+_=
8) Solve
14+_=
9) Solve
12+_=
10) Solve
21+_=
11) Solve
33+_=
12) Solve
18+_=
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