1. Pre – Algebra
Monday
• Please write your
homework down in your
agenda book and have your
homework from Friday out.
• Correct homework
– Core Workbook p. 45 - 48
• Return and go over Partner
Quiz
• Please get out your spiral
notebooks
– Investigation 3
• Vocabulary
• Begin working on tonight’s
assignment
– Core Workbook p. 49 - 51

2. Investigation 3 Vocabulary
• Multiplicative inverses
• Two numbers, a and b, that satisfy ab=1
• 3 and 1/3 are multiplicative inverses
• -1/2 and -2 are multiplicative inverses
• Multiplicative identity
• The multiplicative identity for rational numbers is 1
• Multiplying any rational number by 1 does not change the value
• N(1) = N
• 4/9(1) = 4/9
• 5/8(3/3) = 5/8

3. Pre-Algebra Warm-up: Tuesday
1. What does it mean to say that an operation is
commutative?
• Use a number line to find each sum
2. 3 + (-8)
3. -4 + 9
• Find the sum without using a number line
4. -31 + 16
5. A contestant on a game show has 20 points. She
answers a question correctly to win 10 points. Then she
answers a question incorrectly and loses 15 points.
What is the contestants final score?

4. Pre- Algebra
Tuesday
• Please have your homework
on your desk and get started
on your warm up.
• Discuss last night’s homework
– Core Workbook p. 49 - 51
• Please have your spiral
notebooks on your desk
– 3.1 Multiplication Patterns
with Integers
• Get started on tonight’s
homework
– Core Workbook p. 52 - 54

5. Investigation 3
3.1
Multiplication
Patterns with
Integers
Focus Question: How is
multiplication of two integers
represented on a number line and
chip board?

9. Pre –Algebra
Warm-up- Wednesday
• Find the sum
1. -51 + (-9)
2. 20 + (-8)
3. The temperature rose 7 degrees in 3 hours. If the
starting temperature was -5 degrees, what was the
final temperature?
• Find each product
4. 12(-3)
5. 8(2.5)

10. Pre-Algebra
Honors
Wednesday
• Please have your homework
on your desk and get started
on your warm up.
• Discuss last night’s
homework
– Core Workbook p. 52 - 54
• Please have your spiral
notebooks on your desk.
– 3.2 Multiplication of
Rational Numbers
• Get started on tonight’s
assignment
– Core Workbook p. 59 and 60

11. Investigation 3
3.2
Multiplication
of Rational
numbers
Focus Question: What algorithm
can you use for multiplying
integers?

14. Warm up Thursday
 Tell whether each product is greater than
or less than zero.
1. 5 (-7)
2. 10.5(-4)
3. -2 (-3) (-1)
 Evaluate x – y for each set of values.
4. x = 14 and y = -2
5. x = -9 and y=-9

15. • Please have your
homework on your desk
and get started on your
warm up.
• Discuss last night’s
homework
– Core Workbook p. 59-60
• Please get out your spiral
notebooks
– 3.3 Division of Rational
Numbers
• Get Started on tonight’s
assignment
– Core Workbook p. 61 - 63

19. Warm-up:

20. • Please have your
homework on your desk
and get started on your
warm up.
• Discuss last night’s
homework
– Core Workbook p. 61 - 63
• Class Assignment
– Core Workbook p. 64 - 66
• Turn in weekly
assignment sheet