1. Changing scientific notation to standard form.

2. Scientific Notation Standard Form The exponent on the 10 tells you how many spaces you will move the decimal If the exponent is POSITIVE move RIGHT If the exponent is NEGATIVE move LEFT EXAMPLES: 3.75 x 10 9 = 3,750,000,000 8.62 x 10 -6 =.00000862 (5.23 X 10 7 )

3. 135,000 1.35  Think: Move the decimal right places. 1.35  10 5 10 5 = Write the number in standard notation: A positive exponent means move the decimal to the right, and a negative exponent means move the decimal to the left. Helpful Hint 100,000 5 Example 1: BECAUSE

4. 0.0027 by the reciprocal. by the reciprocal.2.7 1000 Think: Move the decimal left 3 places. 2.7  10 –3 10 -3 = 2.7  1 10x10x10 2.7  10 –3 1 1000  Divide Write the number in standard notation: Example 2: HINT: Just remember that since the exponent is negative we move the decimal to the left 3 spaces

5. -2.01  10 4 Example 3: Write the number in standard notation: HINT: It doesn’t matter that the number (-2.01) is negative – only the exponent changes things

6. Remember…  Simply move the decimal point to the right for positive exponent 10.  Move the decimal point to the left for negative exponent 10. (Use zeros to fill in places.)

7. Example 4  Given: 5.093 x 10 6  Answer: 5,093,000 (moved 6 places to the right)

8. Example 4  Given: 1.976 x 10 -4  Answer: 0.0001976 (moved 4 places to the left)

9. Ticket Out The Door Write each number in standard notation. 1. 1.72  10 4 2. 6.9  10 –3 4. 57,000,000 17,200 0.0069 3. 0.0053 5.3  10 –3 5.7  10 7 Write each number in scientific notation. 5. Order the numbers from least to greatest: 2  10 –4, 9  10 –5, 7  10 –5 7  10 –5, 9  10 –5, 2  10 –4

10. Even More Practice  Below is a list of links to games and activities all having to do with scientific notation.  http://www.aaamath.com/dec71i-dec2sci.html http://www.aaamath.com/dec71i-dec2sci.html  http://janus.astro.umd.edu/cgi-bin/astro/scinote.pl http://janus.astro.umd.edu/cgi-bin/astro/scinote.pl  http://www.sciencejoywagon.com/physicszone/lesson/00ge nral/dectosci.htm http://www.sciencejoywagon.com/physicszone/lesson/00ge nral/dectosci.htm

11. Now take the quiz to test your scientific notation skills!  Click on the link below to take the quiz and then use the answer key for the correct answers.  Quiz Quiz  Answers Answers