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Grade 4 - Mathematics
9.12 Multiplying a Decimal by a Decimal
Method:
Multiply ignoring the decimal point and get the product.
Count the number of digits after the decimal point for the first number.
Count the number of digits after the decimal point for the second number.
Add both
Starting from the right most digit for the product, count the total number of digits and place the decimal point.
Example
Directions:
Find the product of the following decimal numbers. Also write at least 10 examples of your own.
Q 1
: 25.6 x 3.4
87.04
87.15
870.4
8.704
Q 2
: 6.12 x 8.4
514.08
51.408
52.329
5140.8
Q 3
: 9.32 x 2.13
19.8516
1.98516
1985.16
198.516
Q 4
: 5.3 x 2.7
1.431
14.31
1431
143.1
Q 5
: 8.3 x 1.7
2.165
8.21
14.11
23.11
Q 6
: 8.34 x 4.3
32.95
39.421
4.625
35.862
Q 7
: 4.6 x 8.6
16.25
48.36
43.84
39.56
Q 8
: 7.92 x 1.9
150.48
15.048
15.480
1.0548
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Question 10: This question is available to subscribers only!
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