### 20 BEST MATH TRICKS THAT YOU HARDLY KNEW

43, 182 Views

• Uploaded on Jan 17, 2019 by 5-Minute Crafts MEN

• If you are bad at math, this is not your fault. We were simply not taught in school mathematical tricks with which any calculations become elementary. These are techniques by which you can easily count in your mind.

Quick squaring

This technique will help to quickly square a two-digit number, which ends by 5. Multiply the first digit by itself + 1, and add 25 at the end. That's all!

Tip counting

If you need to leave a 15% tip, there is an easy way to determine how much it is. Calculate 10% (divide the number by 10), and then add the resulting number to its half and get the answer.

Subtract from 1000

To perform a subtraction from 1000, you can use this simple rule: subtract from 9 all digits except the last, and subtract the last digit from 10.

Multiplication by 5

Divide the number by 2. If the result is an integer, add a 0 at the end. If not, ignore the comma and add 5 at the end.

Complex multiplication

If you need to multiply large numbers, one of them being even, you can simply regroup them to get the answer.

Also see how to convert Celsius to Fahrenheit and vice versa - Fahrenheit to Celsius.

TIMESTAMPS:

1:06 Multiply Large Numbers
1:40 Find percentage
4:18 The butterfly method, addition and subtraction of fractions
6:10 Fast exponentiation
7:53 Learn numbers with children

----------------------------------------------------------------------------------------
Our Social Media:
Instagram: https://www.instagram.com/5.min.crafts/