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Chapter 1: Units and Problem Solving

Difficulty Level: At Grade Created by: CK-12

License: CC BY-NC 3.0

The Big Idea

Units identify what a specific number refers to. For instance, the number 42 can be used to represent 42 miles, 42 pounds, or 42 elephants! Numbers are mathematical objects, but units give them physical meaning. Keeping track of units can help you avoid mistakes when you work out problems.

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Date Created:

Feb 23, 2012

Last Modified:

Aug 10, 2015
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