Add 3-digit and 1-digit numbers

Solve these mental math problems!

1) Solve
696+4=
2) Solve
249+5=
3) Solve
247+7=
4) Solve
859+7=
5) Solve
277+4=
6) Solve
112+4=
7) Solve
570+3=
8) Solve
726+2=
9) Solve
523+5=
10) Solve
256+2=
11) Solve
522+3=
12) Solve
944+9=
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