Lesson 9: Addition and Subtraction of Decimals

Objective

At the end of this lesson, students should be able to:

• Add and subtract decimals with the same decimal places.
• Add and subtract decimals with different decimal places.

Addition and subtraction of decimals follow the normal rules for adding and subtracting whole numbers. However, there are a few steps that must be followed when adding or subtracting decimals.

                                 

 

Example 3

Add the following decimals

a) 1.53 + 3.4 + 5.749

b) 5.93 + 0.8 + 41.352

c) 32.53 + 124.6 + 2.814

solution 

Remember that whole numbers have their decimal points after the units place.