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Mental Math
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12+9
21
Oops!
Okay!
14+9
23
Oops!
Okay!
19+8
27
Oops!
Okay!
18+6
24
Oops!
Okay!
15+8
23
Oops!
Okay!
13+8
21
Oops!
Okay!
14+7
21
Oops!
Okay!
15+9
24
Oops!
Okay!
18+7
25
Oops!
Okay!
11+4
15
Oops!
Okay!
11+2
13
Oops!
Okay!
11+8
19
Oops!
Okay!
16+8
24
Oops!
Okay!
14+8
22
Oops!
Okay!
19 +9
28
Oops!
Okay!
17+7
24
Oops!
Okay!
14+6
20
Oops!
Okay!
17+9
26
Oops!
Okay!
11+7
18
Oops!
Okay!
18+9
27
Oops!
Okay!
15+6
25
Oops!
Okay!
12+8
20
Oops!
Okay!
12+6
18
Oops!
Okay!
19+6
25
Oops!
Okay!
12+8
20
Oops!
Okay!
16+9
25
Oops!
Okay!
11+6
17
Oops!
Okay!
11+5
16
Oops!
Okay!
18+8
26
Oops!
Okay!
16+6
22
Oops!
Okay!
12+7
19
Oops!
Okay!
13+9
22
Oops!
Okay!
16+5
21
Oops!
Okay!
15+7
22
Oops!
Okay!
19+7
26
Oops!
Okay!
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