Subtract 1-digit from a 2-digit number

Solve these mental math problems!

1) Solve
60-7=
2) Solve
90-1=
3) Solve
76-6=
4) Solve
99-3=
5) Solve
67-2=
6) Solve
98-3=
7) Solve
12-4=
8) Solve
29-2=
9) Solve
11-3=
10) Solve
28-5=
11) Solve
90-5=
12) Solve
46-8=
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