A student has $78 in his checking account. If the student spends $12 on lunch, which number could be combined with the amount left in the account to make zero?
Answer
A
–90
B
–78
C
–66
D
–12
Explanation
After spending $12, the student has $78 − $12 = $66 left. The number that adds to $66 to make zero is −$66, so the correct choice is −66.
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