Thats how toppers do complex calculations during exams. Learn how to easily do quick mental math calculations. Lets start with the multiplication by 9.
For example if you are multiplying 125 x 15 you can break.
Believe it or not you have the ability to perform lightning quick calculations that will astonish your friends family and teachers. However if you really want to increase your speed at maths problems here are a few hacks. Start by taking the first digit of the first number 2 for 24 and multiplying that by the number directly higher than it which will give you the first digit s of the. Using Other Methods to Calculate 1.