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Study
2-by-2 Vertical Addition
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Add the following
91
Oops!
Okay!
Add the following
79
Oops!
Okay!
Add the following
127
Oops!
Okay!
Add the following
71
Oops!
Okay!
Add the following
71
Oops!
Okay!
Add the following
96
Oops!
Okay!
Add the following
88
Oops!
Okay!
Add the following
109
Oops!
Okay!
Add the following
90
Oops!
Okay!
Add the following
99
Oops!
Okay!
Add the following
80
Oops!
Okay!
Add the following
74
Oops!
Okay!
Add the following
79
Oops!
Okay!
Add the following
67
Oops!
Okay!
Add the following
38
Oops!
Okay!
Add the following
89
Oops!
Okay!
Add the following
100
Oops!
Okay!
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