Math

9-4=
5
4
3
8-2=
5
6
4
15-5=
10
9
5
20 - ____=20
20
0
10
90-60=
30
20
40
30-15=
15
10
11
400-200=
200
100
90
52-1=
50
51
49
_____ - 1=24
25
22
20
_____ - 8=10
8
18
9
0
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