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Module 3 Lesson 2.notebook
1
December 16, 2015
Module 3, Lesson 2
HW:
• Lesson 2 Problem Set #1 def,
2 def, 3def
Do Now:
Exit Ticket from Lesson 1
AIM: Generating
Equivalent Expressions
12/16/15
Module 3 Lesson 2.notebook
2
December 16, 2015
Module 3 Lesson 2.notebook
3
December 16, 2015
Exit Ticket Solutions
Module 3 Lesson 2.notebook
4
December 16, 2015
Homework Answers S.5
Module 3 Lesson 2.notebook
5
December 16, 2015
Homework Answers
S.5
Module 3 Lesson 2.notebook
6
December 16, 2015
Homework Answers S.6A
Module 3 Lesson 2.notebook
7
December 16, 2015
Relevant Vocabulary S.10
Module 3 Lesson 2.notebook
8
December 16, 2015
Opening Exercise:
S.6B
Module 3 Lesson 2.notebook
9
December 16, 2015
x
1 ­1
­x
(5x - 9) - (2x + 6)
Subtracting Expressions
x
x
x
x
x
­1
­1
­1
­1
­1
­1
­1
­1
­1
­x
­x
­1
­1
­1
­1
­1
­1
Module 3 Lesson 2.notebook
10
December 16, 2015
x
1 ­1
­x
(-2x + 4) - (5x - 8)
Subtracting Expressions
­x
­x
1
1
1
1
­x
­x
­x
­x
­x
1
1
1
1
1
1
1
1
Module 3 Lesson 2.notebook
11
December 16, 2015
Example 1
Subtracting Expressions: S.7
Module 3 Lesson 2.notebook
12
December 16, 2015
Example 2
Combining Expressions Vertically
S.7
Module 3 Lesson 2.notebook
13
December 16, 2015
Example 3
Using Expressions to Solve Problems S.8
Module 3 Lesson 2.notebook
14
December 16, 2015
Example 4
Expressions from Word Problems
It costs Margo a processing fee of $3 to rent a storage unit, plus $17 per month to keep her
belongings in the unit. Her friend Carissa wants to store a box of her belongings in Margo's
storage unit and tells her that she will pay her $1 toward the processing fee and $3 for every
month that she keeps the box in storage. Write an expression in standard form that
represents how much Margo will have to pay for the storage unit if Carissa contributes. Then,
determine how much Margo will pay if she uses the storage unit for 6 months.
S.8
Module 3 Lesson 2.notebook
15
December 16, 2015
Example 5
Extending Use of the Inverse to Division S.9
Module 3 Lesson 2.notebook
16
December 16, 2015
S.10
Module 3 Lesson 2.notebook
17
December 16, 2015
S.11
Module 3 Lesson 2.notebook
18
December 16, 2015
S.11
Module 3 Lesson 2.notebook
19
December 16, 2015
S.11
Module 3 Lesson 2.notebook
20
December 16, 2015
Closing:
1.) Why can't we use any order, any grouping directly with
subtraction and division?
2.) How can we use any order, any grouping in expressions where
subtraction or division are involved?
Module 3 Lesson 2.notebook
21
December 16, 2015

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Module 3 lesson 2