1. 0-3 Operations with Integers
Goals:
Add, subtract multiply and divide integers
Use addition, subtraction, multiplication and division to solve real life problems

2. Vocabulary
Opposites – two points that are the same distance from zero.
Absolute Value – distance from zero (never negative)

3. Opposites
Find the opposite of each number: 2 -5 -6 13

4. Absolute value
Find the absolute value of each number: 3
-16 38 -5

5. Addition Examples -2 + 5 = 3 = -4 = -12 = 6 = 0 2 + (-6) -4 + (-8)
(-6)
5 + (-2) + 3
(-2)
= 3 = -4 = -12 = 6 = 0

6. Subtraction Examples -4 – 3 = -7 = -1 = 6 = 4 = -37 = 38 10 – 11
12 – 6
-2 – (-6)
-15 – 22
25 – (-13)
= -7 = -1 = 6 = 4 = -37 = 38

7. Multiplication Examples
(–9)(5)
(–3)(–3)
(–6)(4)(–2)
(2)(–1)(3)
(–2)2
(–3)3
= –45
= 9
= 48
= –6
= 4
= –27

8. Division Examples 10 ÷ (–2) –15 ÷ (–3) –16 ÷ 4 –112 ÷ (–8) 96 ÷ (–6)
= –5 = 5 = –4 = 14 = –16

9. Practice
Examples on Whiteboards

10. Word Problem #1
You are in a submarine that is 500 feet below the surface of the water. You go down 150 more feet. What is your current depth? -650 feet

11. Word Problem #2
You borrowed $10 from your uncle. You paid him back $5. How much money do you owe now? $5

12. Word problem #3
A flying squirrel descends from a tree with a velocity of –6 feet per second. Find how far the squirrel has descended after 3.5 seconds.
–21 feet

13. Word Problem #4
Your aunt lends you $175 to buy a guitar. You will give her $25 per week. How long will it take to pay her back?
7 weeks

14. Homework
Page P12 #2-18 even #19-23