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
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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.

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2 teachers like this lesson
  40 minutes
01 absolute 04
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