Shortcut to multiply any number from 10-19 by 5

Whenever you want to multiply any 2 digit number by 5, this trick is simply amazing to use.We shall learn this trick using an example.

Suppose we want to multiply 16 by 5
Step 1:Assume the closest round number as base
In our example,we can assume 10 as base.

Step 2:Multiply the base by 5.
We get 10 x 5 = 50

Step 3:Now multiply unit place digit by 5
We get 6 x 5 = 30

Step 4:Add result obtained in step 2 and step 3
We get 50 + 30 = 80

Ans 16 x 5 = 80

Lets see another example

Step 1:Assuming 10 as base

Step 2:Multiplying the base by 5
We get 10 x 5 = 50

Step 3:Multiplying the unit place digit by 5
We get 7 x 5 = 35

Step 4:Adding step 2 and step 3
We get 50 + 35 = 85

Ans 17 x 5 = 85