Addition and Subtraction of Decimals 

Addition  

Adding decimals is a simple and same method of adding any other number.  

To add decimals, we follow these steps: 

The following examples will make this concept more clear 

Example: Add 1.462 to 1.36 

First, we convert the numbers to like decimals 

i.e. 1.462 + 1.36 = 1.462 + 1.360 

Now, 

Example: Add 31.725, 0.475 and 5 

First, we convert the numbers to like decimals 

i.e. 31.725 + 0.475 + 5 = 31.725 + 0.475 + 5.000 

Now, 

Example: If English book cost $9.94, Mathematics book cost $0.31, Hindi book cost $0.99 and Science book cost $1.94. Find the total cost of all the books? 

Solution: 

Cost of English book = $9.94 

Cost of Mathematics book = $0.31 

Cost of Hindi book = $0.99 

Cost of Science book = $1.94 

To find the total cost, we add the cost of these books as- 

Thus, the total cost of the books is $13.18. 

Subtraction of Decimals 

Example: Subtract 1.362 from 1.97 

First, we convert the numbers to like decimals 

i.e. 1.97 - 1.362 = 1.970 - 1.362 

Now, 

Example: Subtract 51.962 from 77.27 

First, we convert the numbers to like decimals 

i.e. 77.27 – 51.962 = 77.270 – 51.962 

Now, 

Example: Bill’s father gave him $1.59. If he spent $0.32 on chocolates, how much money is left with him? 

Solution:  

Amount Bill got from his father = $1.59 

Amount he spent on chocolates = $0.32 

Amount left with him = $1.59 - $0.32 

Thus, amount left with him is $1.27