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Study
Addition & Subtraction
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17 - 9 =
8
Oops!
Okay!
13 + 5 =
18
Oops!
Okay!
15 - 8 =
7
Oops!
Okay!
4 - 0 =
4
Oops!
Okay!
2 + 8 =
10
Oops!
Okay!
3 + 4 =
7
Oops!
Okay!
10 + 4 =
14
Oops!
Okay!
8 + 5 =
13
Oops!
Okay!
16 - 3 =
13
Oops!
Okay!
1 + 13 =
14
Oops!
Okay!
20 - 3 =
17
Oops!
Okay!
2 + 17 =
19
Oops!
Okay!
17 + 3 =
20
Oops!
Okay!
5 + 7 =
12
Oops!
Okay!
9 - 8 =
1
Oops!
Okay!
19 - 10 =
9
Oops!
Okay!
9 + 2 =
11
Oops!
Okay!
14 - 7 =
7
Oops!
Okay!
6 + 6 =
12
Oops!
Okay!
12 - 4 =
8
Oops!
Okay!
18 - 12 =
6
Oops!
Okay!
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