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Subtraction
Addition
100
3-1=
2
100
4+1=
5
200
8-5=
3
200
5+4=
9
300
10-6=
4
300
10+3=
13
400
8-_=4
4
400
7+__=10
3
500
10-_=3
7
500
6+__=11
5