3. Sig Fig Rules for
Calculations
With Mr. Causey

4. You will learn how to
use sig figs in your
calculations.

5. TI-84 Calculator

6. Significant Figures
How to use your calculator

7. Why? Sig figs must be preserved in calculations.
In order to maintain Integrity.
To show the tools’ precision.

8. Addition Rule
When adding or subtracting use the least precise place value.
13.04
+ 12.2 =
26.5
So, the 4 rounds up to a 5
least precise

9. Multiplication Rule
When multiplying or dividing use the number of Fewest Digits.
15.165
x 5.0
÷ 3.02 = 25
So, the 5 stays a 5
fewest digits

11. Addition 1.2m + 2.35m = 3.55m 3.6m So, round the 5 up to a 6
least place value
Remember You can only add or subtract like terms

12. Multiplication 21.0 cm x 3.2 cm x 15.3 cm = 1.0 x 103 cm3 1000 cm3
So, round off here
Change to scientific notation
fewest sig figs
Remember that 1 cubic centimeter is equal to 1 milliliter

13. Division
fewest sig figs
3845.2m3 = m2 m2
m3-1 m
So, round off here
Remember to subtract the exponents

14. Recap When adding or subtracting use the least precise Place Value.
When multiplying or dividing use the
number with the Fewest Digits.

15. Send an email to: mrcausey@mrcausey.com
Copyright © 2010 by Darrell Causey, Jr.

16. Check It Out Go to www.mrcausey.com
PowerPoint Videos and much, much more.

17. Subscribe Channel STUDIES have shown that it increases your IQ!
Disclaimer: The studies were totally bogus.

18. Notice
This broadcast and its contents are the sole property of Darrell Causey, Jr. and are protected by Federal law and international treaties. You are strictly prohibited from making a copy or modification of, or from rebroadcasting or re-encoding, this broadcast without prior written permission from Darrell Causey, Jr. except as permitted by law.
© 2012 All Rights Reserved

19. Happy Ions!!

20. No integers or numbers were harmed in the making of this video.
Any resemblance to anyone living, dead or fictional is totally your own fault.