Math Shortcuts

Normally, we tell you to show your work, but if you want to try to solve difficult problems mentally -
like the Math Leaguers do - here are some tips.

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Divisibility Rules

Least Common Multiples

Multiplying a 2-Digit Number by 11

Multiplying Two-Digit Numbers

Multiplying Numbers Near 50

​Multiplying Three Digits by Two Digits

​Multiplying Numbers Near 100​

Squaring a Number Ending in 5

Squaring Numbers​

​Vedic Math