What is $7-3(-8-2) + 6 -:2$ ?

Question

3897 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-10T00:32:49

40

We can use PEMDAS:

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

First we have a $color(red)(P)$ :

$7-3color(red)((-8-2))+6 -:2$

$7-3color(red)((-10))+6 -:2$

Next we have an $color(green)(M)$ and a $color(green)(D)$

$7color(green)(-3(-10))+color(green)(6 -:2)$

$7color(green)(+30)+color(green)(3)$

And now we have $color(brown)(A)$

$color(brown)(7+30+3)=40$

What is 7-3(-8-2) + 6 -:27-3(-8-2) + 6 -:2?