Add Whole Hundreds to 4-Digit Numbers

Solve these mental math problems!

1) Solve
5911+300=
2) Solve
6967+900=
3) Solve
3495+600=
4) Solve
6743+900=
5) Solve
1230+700=
6) Solve
4398+800=
7) Solve
5696+600=
8) Solve
5963+400=
9) Solve
3151+300=
10) Solve
8504+900=
11) Solve
4734+700=
12) Solve
4192+400=
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