Discussion

3 – (23 – 2[3 – 16 ÷ 2]) =
(A)   –15
(B)...
(C)...
(D)...
(E)...
(F)...
*This question is included in Nova Math - Diagnostic/Review:, question #4

The solution is

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

-2 by -5?
Why not 8 by -5?
Image Not Available
Contributor
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.