What's Your Sign: Integer Addition
Common Core State Standards
Math 
Math 
7 
Grade 7 
NS 
The Number System 
A 
Apply and extend previous understandings of operations with fractions 
1b 
Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram. a. Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged. b. Understand p + q as the number located a distance q from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing realworld contexts. c. Understand subtraction of rational numbers as adding the additive inverse, p – q = p + (–q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in realworld contexts. d. Apply properties of operations as strategies to add and subtract rational numbers. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
7 
Grade 7 
NS 
The Number System 
A 
Apply and extend previous understandings of operations with fractions 
1d 
Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram. a. Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged. b. Understand p + q as the number located a distance q from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing realworld contexts. c. Understand subtraction of rational numbers as adding the additive inverse, p – q = p + (–q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in realworld contexts. d. Apply properties of operations as strategies to add and subtract rational numbers. 
Download Common Core State Standards (PDF 1.2 MB) 

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 Lesson Objective
 Students master integer addition using number lines as a visual tool
 Length
 5 min
 Questions to Consider
 How does the use of number lines help students visualize integer operations?
 How does this approach support longterm conceptual understanding as compared to rote memorization of rules?
 Why is it important to use both horizontal and vertical number lines?
Teacher & School Info
 School Details
 Willard Middle School Berkeley, CA
 Population
 561 students
 District Spending
 $11,289
Supporting Materials

What’s Your Sign  Integer Addition Transcript
Transcript for What’s Your Sign  Integer Addition lesson

What’s Your SignInteger Addition  Warm Up
Warm Up exercise for What’s Your SignInteger Addition

Understanding Positive and Negative Integers
A lesson plan from Resource Room for teaching positive and negative integers

Integer Card Game
A card game to practice adding positive and negative integers