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This worksheet is about multiplication and division by tenths.
Work out the following problems mentally.
Example 1
0.9 × 0.9
9 × 9 = 81
As we've multiplied both 0.9's by 10 we've multiplied by a total of 100. This means we will need to divide our answer by 100.
So, 0.9 × 0.9 = 0.81
Example 2
0.9 × 9000
9 × 9000 = 81000
As we've multiplied 0.9 by 10 to get 9 we will need to divide our answer by 10.
So, 0.9 × 9000 = 8100
Example 3
8.1 ÷ 9
81 ÷ 9 = 9
As we've multiplied 8.1 by 10 to get 81 we will need to divide our answer by 10.
So, 8.1 ÷ 9 = 0.9
Example 4
8.1 ÷ 0.9
81 ÷ 9 = 9
As we've change the two values using the same proportion we don't need to do anything to the answer we get.
