How do you simplify $7 + 9 \times 3 - 25$ $7+9times3-25$ using order of operations?

Question

3830 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-07-01T01:55:30

$29$ $29$

The order of operations, sometimes known by the acronym PEMDAS (or some variant of it) is:

$P$ $color(red)(P)$ - Parentheses (also known as Brackets)
$E$ $color(blue)(E)$ - Exponents
$M$ $color(green)(M)$ - Multiplication
$D$ $color(green)(D)$ - Division (this has the same weight as M and so I gave it the same colour)
$A$ $color(brown)(A)$ - Addition
$S$ $color(brown)(S)$ - Subtraction - (again, same weight as A and so the same colour)

Here we have:

$7 + 9 \times 3 - 5$ $7color(brown)+9color(green)(xx)3color(brown)-5$

The multiplication goes first:

$7 + 27 - 5$ $7+27-5$

and now we work this from left to right:

$34 - 5$ $34-5$

$29$ $29$

Answer 2 · 2018-08-09T19:54:35

$9$ $9$

Identify the number of terms first.

Terms are separated by $+ and -$ $+ and -$ signs.

Simplify each term first.

$color(blue)(7" ") color(green)(+" "9xx3" ") color(magenta)(-" "25)$

$=color(blue)(7" ") color(green)(+" "27" ") color(magenta)(-" "25)$

$=" "34" "-" "25$

$= 9$

How do you simplify 7+9times3-25 7+9×3−257+9times3-25 using order of operations?