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Addition
Subtraction
100
2+2=?
4
100
2-2=?
0
200
6+6=?
12
200
6-2=?
4
300
4+4=?
8
300
3-2=?
1
400
5+5=?
10
400
5-4=
1
500
10+10=
20
500
9-3=?
6