How about trying to multiply by 14 or 16 in your head?

Multiplying by 101 or 99 in your head. Sounds difficult, but you can do it by multiplying by 100 and then adjusting.

Multiplying whole numbers and tenths by a single digit. When multiplying numbers like these it is a good idea to start with the whole number or units.

Using knowledge of place value and times tables to multiply by 10, 20, 50, 100 and 1000.