In the previous post we learnt how to multiply any number from 40 to 49 by 5 in seconds.Today we are going to learn another amazing trick to multiply any number from 50 to 59 by 5 in seconds.
Let us see the steps
Step 1: Assume the base as 50
Step 2: Multiply the base by 5
Step 3:Multiply the unit place digit by 5
Step 4:Add the results obtained in step 2 and step 3 to get
final answer.
Now lets consider a few examples to understand better
Example 1:51 x 5 = ?
Step 1:We assume the base as 50.
Step 2:Multiplying the base by 5
We get 50 x 5 = 250
Step 3:Multiplying the unit place digit by 5
We get 1 x 5 =5
Step 4:Adding results obtained in step 2 and step 3
We get 250 + 5 = 255
Ans 51 x 5 = 255
Example 2:56 x 5 = ?
Step 1:We assume the base as 50.
Step 2:Multiplying the base by 5
We get 50 x 5 = 250
Step 3:Multiplying the unit place digit by 5
We get 6 x 5 = 30
Step 4:Adding results obtained in step 2 and step 3
We get 250 + 30 = 280
Ans 56 x 5 = 280