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Question

Find the value of -9 + 10 - (-12) - 6

A
7
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B
-7
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C
6
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D
-6
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Solution

The correct option is A 7
= -9 + 10 - (-12) - 6
First arrange the positive and negative integers seperately,
= -9 - 6 - (-12) + 10
= -(15) + (additive inverse of -12) + 10
= -15 + 12 + 10
= -15 + 22
= -15 + 15 + 7
= 7

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