Objective
At the end of this lesson, students should be able to multiply decimal numbers by 10, 100 or 1000.
Decimals can easily be multiplied by 10, 100 and 1000.
Example 1
a) 1.24 x 10 b. 13.5 x 10 c. 15.0 x 10
Solution
a) Move the digits the required number of times and fill the empty places with zero(s)
NB: Every decimal ending with point zero (.0) is a whole number.
Example 2
a) 4.86 x 100 b. 15.5 x 100
Solution
Move each digit 2 places to the left and fill empty spaces with zeros.
Example 3
a) 4.273 x 1000 b. 0.6 x 1000
Solution
Move each digit 3 places to the left and fill the empty spaces with zeros.
(Note that we do not write ‘0’ in the thousandth place in the answer because we can’t start a number with a zero)
Unit 10 Lesson 12: Exercise 1
Complete the following multiplications:
Unit 10 Lesson 12: Exercise 2
Provide the correct answers for the following