Lesson 9 – Addition and Subtraction Of Decimals

Objectives:

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

• Subtract one decimal number from another.

Addition or subtraction of decimals can be done by following a few steps:

Example 1

Add 26.431 + 15.312 + 8.064

Solution

Example 2

Subtract 2.853 from 8.976

5.74 + 25.376 + 0.8743

Solution

Example 4

324.5 – 8.326

Unit 10 Lesson 9: Exercise 1

Workout the following addition and subtraction questions and provide correct answers for each of them.

1) 7.52   2) 65.795   3) 2.26   4) 66.54
5) 11.569   6) 2.871   7) 131.7   8) 67.6093
9) 180.922   10) 5.44

Unit 10 Lesson 9: Exercise 2

Solve these addition and subtraction questions.

1) 1.6275   2) 4.353   3) 346.7602   4) 117.623
5) 391.13   6) 66.131   7) 111.7484   8) 0.376
9) 401.335   10) 78.474

Unit 10 Lesson 9: Exercise 3

Provide the right answer for each of the following.

1) 12.61kg   2) 11.882m   3) 28.257   4) 39.7cm
5) 35.098g   6) 24.64ml   7) 3.049km   8) 4.38
9) 785.293   10) 54.018

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