Exponents: Practice Questions ACT

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1. 0.00875 equals:

   1. 8.75 × 10 − 2

   2. 8.75 × 10 − 3

   3. 8.75 × 10 − 3

   4. 87.5 × 10 − 4

   5. 87.513 × 104

   Answer: b

2. 104 is not equal to which of the following?

   1. 100, 000

   2. 1.0 × 10

   3. 10 × 10 × 10 × 10

   4. 10 × 10

   5. 10, 000

   Answer: a

3. Multiply 104 by 102

   1. 10

   2. 10

   3. 10

   4. 10

   5. 101

   Answer: c

4. Divide x5 by x2

   1. x

   2. x

   3. x

   4. x

   5. x2.5

   Answer: d

5. Find 8.23 × 109

   1. 0.00000000823

   2. 0.000000823

   3. 8.23

   4. 8230000000

   5. 823000000000

   Answer: d

6. 83, 000 equals:

   1. 83.0 × 10

   2. 8.3 × 10

   3. 8.3 × 10

   4. 83.0 × 10

   5. 83.0 × 10 − 7

   Answer: b