order of operations
When performing calculations, there is a specific order you must follow in order to get a correct answer. Often the acronym used to remember the order is BIDMAS or BODMAS. B=brackets, I=indices (O=Orders-powers and roots), D=division, M=multiplication, A=addition, S=subtraction. Once you perform calculations in this order, you should get a correct answer. In recent years, the word PEMDAS has also been used. P=parentheses, E=exponents (powers and roots), D=division, M=multiplication, A=addition, S=subtraction.
Example 1: (2 + 4) × 5 ?
First (2 + 4) = 6,
then 6 × 5 = 30
Example 2: 4 + (6 × 2) ?
First (6 x 2) = 12,
then 4 + 12 = 16
Example 3: 30 + 5 × 3 ?
=30 + 15
You can remember by saying "Please Excuse My Dear Aunt Sally"....or
Pudgy Elves May Demand A Snack
Popcorn Every Monday Donuts Always Sunday
Please Eat Mom's Delicious Apple Strudels
People Everywhere Made Decisions About Sums
In the UK they say BODMAS (Brackets,Orders,Divide,Multiply,Add,Subtract),
In Canada they say BEDMAS (Brackets,Exponents,Divide,Multiply,Add,Subtract).
It all means the same thing! It doesn't matter how you remember it, just so long as you get it right.
Click the calculator to make sure your order of operations is correct.