To solve these problems, we use a simple rule for multiplying decimals by powers of ten (10, 100, 1000).
The Rule:
When you multiply a number by 10, move the decimal point
1 place to the right.
When you multiply a number by 100, move the decimal point
2 places to the right.
When you multiply a number by 1000, move the decimal point
3 places to the right.
If you run out of digits, just add a zero.
Let's solve them one by one:
1.
41.3 × 10
* Move the decimal point 1 place to the right.
* 41.3 becomes 413.
2.
10.9 × 10
* Move the decimal point 1 place to the right.
* 10.9 becomes 109.
3.
57.6 × 10
* Move the decimal point 1 place to the right.
* 57.6 becomes 576.
4.
20.1 × 100
* Move the decimal point 2 places to the right.
* 20.1 becomes 201.
5.
49.8 × 100
* Move the decimal point 2 places to the right.
* 49.8 becomes 4980.
6.
7.9 × 100
* Move the decimal point 2 places to the right.
* 7.9 becomes 790.
7.
2.8 × 1000
* Move the decimal point 3 places to the right.
* 2.8 becomes 2800.
8.
6.5 × 1000
* Move the decimal point 3 places to the right.
* 6.5 becomes 6500.
Final Answer:
413, 109, 576, 201, 4980, 790, 2800, 6500
Parent Tip: Review the logic above to help your child master the concept of powers of 10 worksheets.
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