How do you simplify 5^2- 8 ÷ 2 using PEMDAS?

3 Answers
EET-AP
Oct 28, 2017

PEDMAS for 5^2-8-:2=21

Explanation:

You need to start with the Exponent:

5^2=25

Then do the Division:

8-:2=4

Then you can Subtract:

25-4=21

Jim G.
Oct 28, 2017

21

Explanation:

"following the order of operations as set out in PEMDAS"

["Parenthesis (brackets), Exponents (powers),"
"Multiplication, Division, Addition, Subtraction "]

rArr25-8-:2larrcolor(red)" exponent"

=25-4larrcolor(red)"dividion"

=21larrcolor(red)"subtraction"

EZ as pi
Oct 28, 2017

21

Explanation:

Identify the individual terms first. There are two terms.

Each term is simplified to a single answer and they are added or subtracted in the last step.

You can simplify in different terms in the same line.

Within each term the order of operations is

  • brackets
  • powers and roots
  • multiply and divide

" "color(blue)(5^2)color(red)( - 8div2)

= color(blue)(25)color(red)( - 4)

= 21

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