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Question

Fill in the blanks
15 + (-9) + 23 + (-7) = ____

A
22
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B
-21
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C
21
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D
20
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Solution

The correct option is A 22
First arrange the positive integers and negative integers groups together, we have
= 15 + (-9) + 23 + (-7)
= 15 + 23 - 9 - 7
= 38 - 16
= 22

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