The rules that say which calculation comes first in an expression

They are:

• do everything inside parentheses first: ()

• then do exponents, like x

• then do multiplies and divides from left to right

• then do the adds and subtracts from left to right

Example:

5 × (3 + 4) − 2 × 8

= 5 × 7 − 2 × 8

= 35 − 16

= 19

They are:

• do everything inside parentheses first: ()

• then do exponents, like x

^{2}• then do multiplies and divides from left to right

• then do the adds and subtracts from left to right

Example:

5 × (3 + 4) − 2 × 8

= 5 × 7 − 2 × 8

= 35 − 16

= 19