1. Do Now “ Happiness is like a butterfly; the more you chase it, the more it will elude you, but if you turn your attention to other things, it will come and sit softly on your shoulder....” –Thoreau

2. Today’s objective I can determine the correct number of significant figures by completing metric conversions.

3. Significant Figures 1)ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 2)ALL zeroes between non-zero numbers are ALWAYS significant. 3)ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. 4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant.

4. Best Example

5. Practice

6. Multiplication/Division Rules 1) The answer’s significant figures should match the number with the LEAST number of sig figs.

7. Practice

8. Addition/Subtraction Rules The LEAST number of decimal places limits the significant figurse

9. Practice

10. Mixed Practice

11. Exit Ticket Complete the following conversions or math problems using the correct sig figs: 1)2400 mm = ________ km 2)60 x 50 = 3)147.3 + 3.33=