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3 – (23 – 2[3 – 16 ÷ 2]) =

3 – (23 – 2[3 – 16 ÷ 2]) =
(A)    –15
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Diagnostic/Review:

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Posted: 06/08/2012 04:40
In this step (8-2[-5]) why do we multiply

-2 by -5?
Why not 8 by -5?
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Posted: 06/08/2012 10:45
Bobo, it's because the order of operations: parentheses, exponent, multiplication and division, then addition and subtraction. PEMDAS for short.
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