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

Example 2:17 x 5=?

**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**