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Arithmetic Homework Help : Decimal Multiplication

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Quiz : Type the product obtained on multiplying the following decimals.


1. 47.2 x 7 =
Answer: 330.4
472 x 7 = 3304.0
There is 1 decimal place in 47.2, so the product must have 1 decimal place.
Thus,
47.2 x 7 = 330.4

2. 4.33 x 3 =
Answer: 12.99
433 x 3 = 1299 
There are 2 decimal places in 4.33, so the product must have 2 decimal places.
Thus,
4.33 x 3 = 12.99

3. 6.94 x 2 =
Answer: 13.88
694 x 2 = 1388 
There are 2 decimal places in 6.94, so the product must have 2 decimal places.
Thus,
6.94 x 2 = 13.88


4. 92.7 x 3 =
Answer: 278.1
927 x 3 = 2781
There is 1 decimal place in 92.7, so the product must have 1 decimal place.
Thus,
92.7 x 3 = 278.1

5. 3.77 x 10 =
Answer: 37.7
377 x 10 = 3770
There are 2 decimal places in 3.77, so the product must have 2 decimal places.
Thus, 
3.77 x 10 = 37.7 = 37.7 
Tip: When 3.77  is multiplied by 10 , the decimal point shifts to the right byplace(s).

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