1. Integers

2. Write the value of this real world example of integers
32 ○ F below zero
A gain of 20 pounds
Falling 62 feet
12○ C above zero
Average attendance for church was down 38 people

3. Write a phrase of a real life example of an integer.
temperature
Depth in water
elevation

4. Workbook Questions
Check your understanding
Workbook Pg 18 #1-12

5. What to do with positive and negative #’s?
Integers
What to do with positive and negative #’s?

6. Absolute value bars and integers
l -8 l
l 42 l
l -17 l
Solve first then take absolute value!
l 5 – 3 l
l -8 – 4 l
- l 9 – 3 l

7. Absolute value bars and integers
Solve then take absolute value bars.
l l
- l -8 – 10 l
l 9 – 32 l

8. What to do with positive and negative #’s?
Day 2
Integers
What to do with positive and negative #’s?

9. Multiplying and Dividing Integers
1st Rule
Same sign = positive
4 ● 3 = 12 or 12 ÷ 4= 3
-8 ● - 6 = or
- 48 ÷ - 8 = 6
Either way: two positives equal a positive answer or two negatives equal a positive answer
2 rules to learn

10. Multiplying and Dividing Integers
2nd Rule
Different signs = negative
4 ● - 3 = - 12
-12 ÷ 4 = -3
-8 ● 6 = - 48
48 ÷ -8 = - 6
If one number in problem is negative then answer is negative
2 rules to learn

11. Multiply and divide integers
- 9 ● 11=
36 ÷ 4 =
- 6 ● 12 =
88 ÷ - 8 =
- 3 ● - 7=
- 24 ÷ 6 =

12. Adding integers- POWER UP
(- 14)
13 + ( -12) =

13. Practice. -15 + 43 + -18 -16 + (- 14) + 49 13 + ( -12) + (-19)
Adding integers
Practice.
(- 14) + 49
13 + ( -12) + (-19)

14. Multiply and divide integers
Work left to right.
- 52 ÷ - 13 ● -2 =
3 ● - 8 ÷ 4 =
-5 ● -9 ● 6 =

15. Adding and Subtracting Integers
Day 3
Adding and Subtracting Integers
Adding integers If #’s have same sign add and keep the sign = = = -150
2 rules to learn

16. Adding and Subtracting Integers
Subtracting integers Use your calculator! No trick! You must subtract their absolute values then take sign of largest #. To subtract an integer, add the opposite.
Adding and Subtracting Integers
2 rules to learn

17. Video
Adding and subtracting integers
Make my Brainpop!

18. Subtracting integers
-15 – 6
(- 14)
13 – ( -12)
34 – 17 =

19. Using the number line Try to solve these problems.
Then check your work with your calculator.
Pg. 97 #’s 1-5