Add 3-digit and 1-digit numbers

Solve these mental math problems!

1) Solve
681+5=
2) Solve
460+2=
3) Solve
656+5=
4) Solve
685+6=
5) Solve
351+3=
6) Solve
394+6=
7) Solve
483+9=
8) Solve
903+9=
9) Solve
519+3=
10) Solve
512+7=
11) Solve
887+3=
12) Solve
302+5=
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