B. E. D. M. A. S.
is a word to help you to remember what to do first in a calculation involving more than one operation.

"Let me do more operations!" 
BEDMAS means:
Brackets

Do these first

Work out the value of any calculations inside brackets.

Exponents


Work out the value of any numbers with exponents.
Sometimes shown as 'of ' meaning multiply.

Division
Multiplication


If these two operations occur together, work from left to right in your calculation.

Addition
Subtraction

Do these last

If these two operations occur together, work from left to right in your calculation.

Get some practice at using brackets with the four basic operations:
Examples 
Answers 
5 + 3 × 2

= 5 + 6 = 11

6 + (5 + 3)

= 6 + 8 = 14

20 − 3 × 5 + 4

= 20 − 15 + 4 = 5 + 4 = 9

2 × 5^{2}

= 2 × 25^{}= 50

(4 + 6) ÷ (2 + 3) 
= 10 ÷ 5 = 2 
Care should be taken when using a calculator to do calculations of this type.
