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Adding up to 10
subtracting up to 10
adding up to 20
100
1+8
9
100
9-2
7
100
11 + 3
14
200
9+1
10
200
10 - 3
7
200
12 + 4
16
300
4+7
11
300
6 - 2
4
300
14 + 4
18
400
2+6
8
400
8 - 7
1
400
11 + 8
19
500
5+5
10
500
10 - 5
5
500
13 + 5
18