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Addition and Substraction
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555 + 222 =
777
Oops!
Okay!
700-650 =
50
Oops!
Okay!
500 + 700 =
1200
Oops!
Okay!
437+13 =
450
Oops!
Okay!
250 + 250 - 500 =
0
Oops!
Okay!
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