Multiplying by 9 using fingers trick.

Quickly squaring numbers ending in 5.

Using the distributive property for easier multiplication.

Dividing by 5 by multiplying by 2 and dividing by 10.

Adding large numbers by breaking them into parts.

Using patterns in multiplication tables.

Estimating answers to check accuracy.

Converting fractions to decimals quickly.

Using number lines for addition and subtraction.

Mental math tips for doubling and halving numbers.