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Grade 4 - Mathematics
9.12 Multiplying a Decimal by a Decimal

Method:
  1. Multiply ignoring the decimal point and get the product.
  2. Count the number of digits after the decimal point for the first number.
  3. Count the number of digits after the decimal point for the second number.
  4. Add both
  5. 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
87.15
8.704
870.4
87.04

 Q 2: 6.12 x 8.4
5140.8
52.329
514.08
51.408

Q 3: 9.32 x 2.13
1.98516
198.516
19.8516
1985.16

 Q 4: 5.3 x 2.7
1431
143.1
14.31
1.431

Q 5: 8.3 x 1.7
2.165
14.11
8.21
23.11

 Q 6: 8.34 x 4.3
4.625
32.95
39.421
35.862

Q 7: 4.6 x 8.6
39.56
43.84
16.25
48.36

 Q 8: 7.92 x 1.9
1.0548
15.048
150.48
15.480

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