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Study
Mental Math Add and Subtract
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0
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0
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4+6
10
Oops!
Okay!
thirty three + twenty seven
60
Oops!
Okay!
35-15
20
Oops!
Okay!
eighty three + seven
90
Oops!
Okay!
Sixteen + four
20
Oops!
Okay!
66-60
6
Oops!
Okay!
thirty - ten
twenty
Oops!
Okay!
nineteen - nine
10
Oops!
Okay!
twelve - six
6
Oops!
Okay!
twenty - eleven
nine
Oops!
Okay!
60-20
40
Oops!
Okay!
5+15
20
Oops!
Okay!
7+3
10
Oops!
Okay!
45+15
60
Oops!
Okay!
12+8
20
Oops!
Okay!
30-15
15
Oops!
Okay!
one hundred - fifty
50
Oops!
Okay!
88-44
44
Oops!
Okay!
50-25
25
Oops!
Okay!
forty five - fifteen
thirty
Oops!
Okay!
100-30
70
Oops!
Okay!
Twenty two - eleven
11
Oops!
Okay!
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