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Addition
Subtraction
Addition 2
100
2+3
5
100
3-2
1
100
10+10
20
200
3+9
12
200
4-2
2
200
9+10
19
300
12+4
16
300
5-2
3
300
6+8
14
400
3+5
8
400
10-4
6
400
7+2
9
500
6+9
15
500
11-5
6
500
6+13
19