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Math: Middle School: Grades 6, 7 and 8 Quiz - Numbers - Decimals - Powers of 10 (Questions)

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When you multiply decimal numbers by 10 all the digits move one place to the left. Divide by 10 and they all move one place to the right.

See how much you know about powers of 10 by playing the following Math quiz regarding decimals.

1. What is 4.65 x 10?
[ ] 0.465
[ ] 46.5
[ ] 465
[ ] 4,650
2. What is 0.08 x 10?
[ ] 0
[ ] 0.1
[ ] 0.8
[ ] 8
3. What is 68.72 / 10?
[ ] 6
[ ] 6.872
[ ] 687.2
[ ] 6,872
4. What is 0.04 / 10?
[ ] 0.004
[ ] 004
[ ] 00.4
[ ] 4
5. What is 7.75 x 100?
[ ] 0.775
[ ] 0.7
[ ] 77.5
[ ] 775
6. What is 44.87 x 100?
[ ] 4.4
[ ] 449
[ ] 4,487
[ ] 4,490
7. What is 692.14 / 100?
[ ] 0.69214
[ ] 6.9214
[ ] 69.214
[ ] 6,921.4
8. What is 88.3 / 100?
[ ] 0.883
[ ] 8.083
[ ] 8.83
[ ] 883
9. When multiplying decimals by 100, how many places do the digits move?
[ ] 0
[ ] 1
[ ] 2
[ ] 3
10. When dividing decimals by 10, how many places do the digits move?
[ ] 0
[ ] 1
[ ] 2
[ ] 3
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Math: Middle School: Grades 6, 7 and 8 Quiz - Numbers - Decimals - Powers of 10 (Answers)
1. What is 4.65 x 10?
[ ] 0.465
[x] 46.5
[ ] 465
[ ] 4,650
2. What is 0.08 x 10?
[ ] 0
[ ] 0.1
[x] 0.8
[ ] 8
Remember it's the digits that move one place to the left when multiplying by 10
3. What is 68.72 / 10?
[ ] 6
[x] 6.872
[ ] 687.2
[ ] 6,872
4. What is 0.04 / 10?
[x] 0.004
[ ] 004
[ ] 00.4
[ ] 4
Note that you need to add a zero before the decimal point
5. What is 7.75 x 100?
[ ] 0.775
[ ] 0.7
[ ] 77.5
[x] 775
6. What is 44.87 x 100?
[ ] 4.4
[ ] 449
[x] 4,487
[ ] 4,490
7. What is 692.14 / 100?
[ ] 0.69214
[x] 6.9214
[ ] 69.214
[ ] 6,921.4
8. What is 88.3 / 100?
[x] 0.883
[ ] 8.083
[ ] 8.83
[ ] 883
Bear in mind the digits move, not the decimal point
9. When multiplying decimals by 100, how many places do the digits move?
[ ] 0
[ ] 1
[x] 2
[ ] 3
10. When dividing decimals by 10, how many places do the digits move?
[ ] 0
[x] 1
[ ] 2
[ ] 3