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Study
Addition & Subtraction
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89+11
100
Oops!
Okay!
75-15
60
Oops!
Okay!
80-72
8
Oops!
Okay!
25+68
93
Oops!
Okay!
67+33
100
Oops!
Okay!
69-54
15
Oops!
Okay!
86-25
61
Oops!
Okay!
36+36
72
Oops!
Okay!
68-28
40
Oops!
Okay!
89-49
40
Oops!
Okay!
90+90
180
Oops!
Okay!
50-15
35
Oops!
Okay!
85+11
96
Oops!
Okay!
29+31
60
Oops!
Okay!
56+29
85
Oops!
Okay!
45-10
35
Oops!
Okay!
45+45
90
Oops!
Okay!
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