Subtracting Whole Tens

Subtract the numbers to find the difference.

1) Solve
40-10=
2) Solve
80-20=
3) Solve
80-20=
4) Solve
80-30=
5) Solve
60-30=
6) Solve
90-20=
7) Solve
80-30=
8) Solve
80-30=
9) Solve
80-30=
10) Solve
70-10=
11) Solve
60-30=
12) Solve
40-10=
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