The document is notes from a math lesson on addition and subtraction of rational numbers. It includes instructions for homework assignments due on October 16th and a mid-module exam. Students are encouraged to take practice quizzes to achieve a goal of scoring 100% on 5 quizzes in a row. The notes provide examples of adding and subtracting rational numbers using a number line model, and discuss challenges of using this model for non-integer rational numbers.

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Module 2 Lesson 7:
Addition and Subtraction
of Rational Numbers
Homework:
1.) Lesson 7 Problem Set All
2.) Mid Module 2 Exam
Friday 10/16
10/9/15
Do Now
Sprint for Lesson 7
Take the practice
quiz on the blog
Goal: 5 quizzes in a
row of 100%

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Problem Set 6 Answer Key
27.5
17
35
7
S.44

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-1 0 1 2 3 4 5 6 7 89 10 11 12
S.45

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S.45

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S.46

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Find the following sums and differences using a number line model.
S.46

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a.) -3
4
5
7
+
b.) -5 3
5 - (-6 )5
6

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S.48

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CLOSING:
• What challenges do you face when using the number line model to
add non-integer rational numbers?
• When using a number line to model 8 ( 2.1), how many units do
we move from 8 and in what direction? Where is the tail of the
arrow, and where is the head? What does your arrow represent?
_ _

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Problem Set #5 S.43A