In the previous post we learnt how to multiply any number from 50 to 59 by 5 in seconds.Today we are going to learn another amazing trick to multiply any number from 60 to 69 by 5 in seconds.
Step 1: Assume the base as 60
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 1:62 x 5 = ?
Step 1:We assume the base as 60.
Step 2:Multiplying the base by 5
We get 60 x 5 = 300
Step 3:Multiplying the unit place digit by 5
We get 2 x 5 =10
Step 4:Adding results obtained in step 2 and step 3
We get 300 + 10 = 310
Ans 62 x 5 =310
Example 2:67 x 5 = ?
Step 1:We assume the base as 60.
Step 2:Multiplying the base by 5
We get 60 x 5 = 300
Step 3:Multiplying the unit place digit by 5
We get 7 x 5 = 35
Step 4:Adding results obtained in step 2 and step 3
We get 300 + 35 = 335
Ans 67 x 5 =335