Reflection: Rigor Absolute Value - Section 2: Mini Lesson

 

In a previous lesson, Identifying Integers, I challenged students to find the "opposite of the opposite" and develop shortcuts for multiple negative signs.  I realized that students may confuse the rules that they developed for parentheses with the absolute value sign.

To discuss this possible misconception I presented students with the two problems:

-(-5) = ?     and -|-5| = ?

Do these equations both have the same answer?

Why not?

We discussed why -(-5) = 5 and -|-5| = -5, until I felt students understood the difference.  I also provided a few more examples for students. 

  Negative of an Absolute Value
  Rigor: Negative of an Absolute Value
Loading resource...
 

Absolute Value

Unit 10: Rational Numbers
Lesson 2 of 9

Objective: SWBAT find the absolute value of an integer.

Big Idea: Numbers are released from jail.

  Print Lesson
2 teachers like this lesson
Subject(s):
  40 minutes
01 absolute 04
 
1
2
3
4
Similar Lessons
 
Integers in the Real World
6th Grade Math » Integers and Rational Numbers
Big Idea: Rational numbers and number lines can be used to represent real world situations.
  Favorites(33)
  Resources(20)
New Haven, CT
Environment: Urban
Carla Seeger
 
Adding and Subtracting Integers with Counters
6th Grade Math » Integers and Rational Numbers
Big Idea: What are opposites and what happens when you add them together? How can you use counters to model 7-9? What about 3 – (-3)? Students work with counters to model adding and subtracting integers.
  Favorites(30)
  Resources(26)
Somerville, MA
Environment: Urban
Andrea Palmer
 
Absolutely Positively the Opposite of Negative
6th Grade Math » Rational Explorations: Numbers & Their Opposites
Big Idea: When a negative is positive and a positive is negative: Understanding absolute value and opposites.
  Favorites(7)
  Resources(19)
Jonesboro, GA
Environment: Urban
Michelle Braggs
 
Something went wrong. See details for more info
Nothing to upload
details
close