11 Mental Math Hacks In 1 Hour English Edition. Life Hacks For School. Just add 5 8 which gives you 13.
Trick 1 Forget the Zeros when doing math Trick 2 Forget the decimal point when doing math Trick 3 Quickly Multiply by the number 4 Trick 4 Quickly Divide by 4 Trick 5 Quickly Multiply by 5 Trick 6 Quickly Divide by 5 Trick 7 Square a number ending in 5 Trick 8 Quickly Multiply by 11 for 2 digits. Special 2 In 1 Edition. MENTAL MATHEMATICS WORKSHEET PART 1.
You can do it in your head too.
The book consists of 75 chapters of about 3-4 pages each. Ethan learned how to calculate problems in his mind from Secrets of Mental Math. Just add 5 8 which gives you 13. Author details and more at.