How do you simplify $125 - 43 + 13$ $125-43+13$ using PEMDAS?

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Answer 1 · 2016-03-21T16:20:16

95

According to PEMDAS you will first add values so
$- 43 + 13 = - 30$ $-43+13=-30$
then subtract
$125 - 30 = 95$ $125-30=95$

Answer 2 · 2016-08-02T21:24:57

$95$ $95$

Adding and subtracting with positive and negative values often leads to confusion.

Note that a sign in front of a number applies ONLY to that number.

So $18 - 7 + 5$ $18 - 7 + 5$ does NOT mean the same as $18 - (7 + 5)$ $18 - (7+5)$
The answers for these are $16 and 6$ $16 and 6$

The easiest way to avoid confusion is to re-arrange the numbers we are allowed to do (which according to the commutative law).

Place the additions at the front of the expression and the subtractions at the end.

$125 - 43 + 13$ $125 -43 +13$ is better understood as:

$125 + 13 - 43$ $125+13 -43$

= $95$ $95$

How do you simplify 125-43+13125−43+13125-43+13 using PEMDAS?