1. Order of Operations
PEMDAS

2. Operations
"Operations" mean things like add, subtract, multiply, divide, squaring, etc. If it isn't a number it is probably an operation.
But, when you see something like (6 × )
What part should you calculate first?
Start at the left and go to the right? Or go from right to left?
Warning: Calculate them in the wrong order, and you will get a wrong answer!
The order of operations is a set of rules to make sure that everyone will get the same answer when calculating a computation problem.

3. PEMDAS Parentheses First ( ) Exponents Second n²
6 × (5 + 3) = 6 × 8 = 48 6 × (5 + 3) = = 33
5 × 2² = 5 × 4 = 20
5 × 2² = 10² = 100

4. PEMDAS Add & Subtract Multiply & Divide before you
2 + 5 × 3 = = × 3 = 7 × 3 = 21
30 ÷ 5 × 3 = 6 × 3 = ÷ 5 × 3 = 30 ÷ 15 = 2 Otherwise just go left to right

5. How Do I Remember It All? PEMDAS!
P Parentheses first
E Exponents second
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)
Divide and Multiply rank equally (and go left to right).
Add and Subtract rank equally (and go left to right)

6. So do it this way:

7. You can remember by saying
“Please Excuse My Dear Aunt Sally”.