# Glossary of terms

## B

• ### BIDMAS

• BIDMAS is an acrostic, where each letter refers to the operations in the order they should be carried out.

Brackets
Indices
Division
Multiplication
eg. The following expression correctly gives the answer as $14$, $2 + 3 \times 4 = 14$, because according to BIDMAS, the multiplication must be performed before the addition. However, if we insert brackets around the $2+3$, this changes the value as follows: $(2+3) \times 4 = 20$, as now, the bracket must be evaluated first.