Description

Sometimes party tricks can be useful short cuts, too. These math tricks also happen to be short cuts to squaring:

• Numbers that end in 5
• Numbers in the 40s
• Numbers in the 50s

This cheat sheet also includes two short cuts with similar techniques:

• Multiplying two numbers in the 90s
• Multiplying two digit numbers that end in 1

If you get no other sheet, this is really the sheet to get!