MATH Hacks- Multiplication by 11 without calculator tutorial
ex: answer the following without calculator:
11 x 45 =
11 x 68 =
11 x 99 =
Can you make it without calculator as fast as possible? this apply only if one of the problem to be multiplied is 11
Do you have any funny videos? submit it here: https://plus.google.com/u/0/communities/117520390586831588188
