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 









 

Example 4

Subtract these:

  1. 6 – 2.24
  2. 281 – 6.4
  3. 28 – 0.98
  4. 12 – 2.931

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

error: Content is protected !!