Scientific Notation

Pre-Test Answers

1. Write the following numbers in scientific notation:

   1. 24,500 = 2.45 X 10⁴

   2. 534,200,000 = 5.342 X 10⁸

   3. 0.00000083 = 8.3 X 10^-7

   4. 0.00643 = 6.43 X 10^-3

2. Write the following in decimal form:

   1. 7 X 10⁴ = 70,000

   2. 6.3 X 10⁷ = 63,000,000

   3. 2.84 X 10^-3 = 0.00284

   4. 3.6 X 10^-8 = 0.000000036

   5. 1 X 10⁵ = 100,000

   6. 5 X 10⁰ = 5

3. Multiply or divide the following:

   1. (2.3 X 10⁶) X (9.4 X 10²) = 2.162 X 10⁹

   2. (4.92 X 10³) X (6.19 X 10^-4) = 3.04548

   3. (5.5 X 10⁸) / (5 X 10²) = 1.1 X 10⁶

   4. (3.6 X 10⁵) / (1.2 X 10^-3) = 3 X 10⁸

4. Add or subtract the following:

   1. (3.5 X 10⁴) + (4.1 X 10³) = 3.91 X 10⁴

   2. (7.46 X 10⁵) + (1.65 X 10³) = 7.4765 X 10⁵

   3. (7.46 X 10⁵) - (1.65 X 10³) = 7.4435 X 10⁵

   4. (7.21 X 10^-3) - (4.29 X 10^-5) = 7.1671 X 10^-3

5. Solve the following:

   1. (5.62 X 10³)² = 3.15844 X 10⁷

   2. 1 / (7.33 X 10⁵) = 1.36 X 10^-6

   3. square root of 9 X 10⁴ = 3 X 10²

 

If you missed more than one of these questions, you will probably want to start the tutorial. Remember to got throught the various parts in order, step-by-step. If you did very well on this test and don't feel you need to look at the tutorial, you might want to take the post-test to be sure you've mastered the material.