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Study
Addition and Subtraction
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23 - 11
12
Oops!
Okay!
25 - 5
5
Oops!
Okay!
10 - 9
1
Oops!
Okay!
6+5
11
Oops!
Okay!
5 + 6
11
Oops!
Okay!
17 - 4
13
Oops!
Okay!
20+7
27
Oops!
Okay!
14 - 7
7
Oops!
Okay!
10 - 5
5
Oops!
Okay!
23 - 2
21
Oops!
Okay!
9+5
14
Oops!
Okay!
7+3
10
Oops!
Okay!
12+4
16
Oops!
Okay!
15+21
36
Oops!
Okay!
10+4
14
Oops!
Okay!
14 - 9
5
Oops!
Okay!
8+7
15
Oops!
Okay!
15 + 1
16
Oops!
Okay!
11+6
17
Oops!
Okay!
20 - 11
9
Oops!
Okay!
15+7
22
Oops!
Okay!
4+5
9
Oops!
Okay!
11+5
16
Oops!
Okay!
11 - 7
4
Oops!
Okay!
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