Math Tricks [multiply by 11in your Head]

Easily we can do it if the number having two digits like 34;

1. Sum up the digits: 3+4=7
2.Put the number between the digits: 374

If the total is more than 10 like 78.

1. Sum up the digits: 7+8=15
2. Put 5 between them and add the carry with the first digit: 858