multiply any number trick
How to multiply ANY numbers the fast way - Fast Math Trick
Fast Math Tricks - How to multiply 2 digit numbers up to 100 - the fast way!
Multiplying any number by 5 in less than 5 seconds | Math Tips and Tricks
Fast Mental Multiplication Trick - multiply in your head using base 10
Easy Multiplication trick for BIG numbers.
Fast Math Tricks - How to multiply 3 digit numbers - the fast way!