How do you simplify 27 - 13 * 2 +17(6 - 5)27−13⋅2+17(6−5)?

1 Answer
Alan P.
Apr 9, 2015

The order of operations for numeric expressions:

  1. anything inside parentheses
  2. exponents
  3. multiplication and division (usually left to right)
  4. addition and subtraction (usually left to right)

So following this sequence
27 - 13*2 + 17(6-5)27−13⋅2+17(6−5)
= 27 - 13*2 + 17(1)=27−13⋅2+17(1)
= 27 - 26 + 17(1)=27−26+17(1)
= 27 - 26 + 17=27−26+17
=1+17=1+17
=18=18

Note that the "left to right" sub-rule is important since
(27-26)+17 != 27 - (26+17)(27−26)+17≠27−(26+17)

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