Missing Subtrahend (Mental Subtraction)

Solve these mental math problems!

1) Solve
964-156=
2) Solve
835-799=
3) Solve
316-206=
4) Solve
381-224=
5) Solve
318-104=
6) Solve
402-206=
7) Solve
111-66=
8) Solve
532-416=
9) Solve
701-122=
10) Solve
101-35=
11) Solve
231-139=
12) Solve
308-37=
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