Lesson 15- Multiplying Decimals By Multiples of 10 Or 100

Objective

At the end of this lesson, students should be able to multiply decimals by multiples of 10 or 100.

Decimals can easily be multiplied by multiples of 10 or 100.

Example 1

a) 1.52 x 20     b.  4.671 x 50

Solution

 

 

Example 2

a) 3.64 x 400     b.  7.805 x 800

Solution

 

 

Unit 10 Lesson 15: Exercise 1

1. 75   2. 184.8   3. 165.8   4. 8.82   5. 167.18
6. 617.0   7. 18298   8. 5539.5   9. 2572   10. 142.4

 

Unit 10 Lesson 15: Exercise 2

Work out the following multiplications.

1. 621   2. 42    3. 66   4. 2970   5. 956.5
6. 8451   7. 27.16   8. 2.92   9. 103.95   10. 388740

 

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