15 – 6 ÷ 3 • 4

Question

What is the order of operations?)

Answer 1

15 - 6 ÷ 3 . 4 =

15- 2 .4 =

15 - 8 =7

 

If it was

 

15 - 6 * 3 ÷ 9 =

15 - 18 ÷ 9 =

15 - 2 = 13

  The point to notice is to do multiplication and division from left to right in order, whichever comes first should be performed first.

 

 8  -  5 ( 19 - 17) =

 

  8 -5 ( 2) = 8 -10 = -2, and is not 3* 2 =6

   Same way with variable

 

   8 - 3 ( X +5) = 8 -3X - 15 = -3X -7

Answer 2

Follow the order of operations (PEMDAS)

 

Parentheses

Exponents

Multiply or

Divide

Addition

Subtraction

 

A trick to remember this is:

Please 

Excuse 

My

Dear 

Aunt 

Sally

 

The caveat here is M and D can be interchangeable, typically follow left to right in the expression (the same is said for addition and subtraction) 

 

6 / 3 = 2

2 * 4 = 8

 

15-8 = 7