reagent

Brackets (Parentheses)

Brackets are symbols used in pairs to group things together.

parentheses or round brackets ( )

square brackets or box brackets [ ]

braces or curly brackets

angle brackets

(Note: Angle brackets can be confusing as they

When we see things inside brackets we do them first (as explained inOrder of Operations).

The parentheses group 3 and 2 together, and 6 and 4 together, so they get done first:

Without the parentheses the multiplication is done first:

With more complicated grouping it is good to usedifferent types of brackets:

The parentheses group 3 and 2 together, and 6 and 4 together, and the square brackets tell us to do all the calculations inside them before multiplying by 4:

Is the set of even numbers from 2 to 8