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