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Addition to 20
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0
0
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2+2
4
Oops!
Okay!
5+3
8
Oops!
Okay!
3+3
6
Oops!
Okay!
5+1
6
Oops!
Okay!
9+9
18
Oops!
Okay!
3+4
7
Oops!
Okay!
4+4
8
Oops!
Okay!
2+7
9
Oops!
Okay!
12+1
13
Oops!
Okay!
2+3
5
Oops!
Okay!
2+8
10
Oops!
Okay!
5+5
10
Oops!
Okay!
8+8
16
Oops!
Okay!
8+2
10
Oops!
Okay!
12+10
22
Oops!
Okay!
4+5
9
Oops!
Okay!
3+3
6
Oops!
Okay!
5+0
5
Oops!
Okay!
11+3
14
Oops!
Okay!
7+7
14
Oops!
Okay!
7+5
12
Oops!
Okay!
0+9
9
Oops!
Okay!
10+10
20
Oops!
Okay!
3+6
9
Oops!
Okay!
0+0
0
Oops!
Okay!
9+4
13
Oops!
Okay!
8+5
13
Oops!
Okay!
6+6
12
Oops!
Okay!
1+1
2
Oops!
Okay!
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