1. Signed Number Operations
Section 2

2. Does the order in which operations are done make any difference?
Ex. Which is the correct answer when simplifying x 12?
6+3x12
=6+36
=42
6+3x12
=9x12
=108 OR

3. What Rule Do These Examples Seem to Follow?

4. PEMDAS (Please Excuse My Dear Aunt Sally)
Parenthesis
Exponents
Multiplication/Division
Addition/Subtraction

5. Now you try, using the rule…
A: 16

6. A: 15

7. A: 28

8. A: 16

9. A: 16

11. A: -96

12. A: -1

13. A: -5.2

14. Absolute Value Absolute Value- the distance of a number from 0
(7 Units from 0)
(7 Units from 0)

15. A: 16

16. Order of Operations Using Signed Numbers
Find the value of y for x= -4
b) y= -17-3x
Find the value of y for x=4
c) y= 7-2x
Find the value of y for x=-2
d) y= 7-3x
= 12 + (-14) = -2
= -17 – 3(-4) = = -5
= 7 – 2(4) = 7 – 8 = -1
= 7 – 3(-2) = 7 +6 = 13

17. Worksheet