Question

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

Answer 1

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`

Answer 2

`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"`

Answer 3

`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`