4.NF.1. Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.

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Ages: 9 - 15
Comparing Fractions - A Virtual Manipulative
From usu.edu, produced by Utah State University
Using this manipulative you may: -Find common denominators -Rename fractions with common denominators -Locate equivalent fractions on a number line -Investigate in-between fractions There are more instructions to the right of the manipulati... [more]
May 15, 2010 at 08:26 PM
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Not Right For WatchKnowLearn
Ages: 18 - 18
Singapore Math: A Spool of Ribbon-Fractions Bar Model
From YouTube, produced by mathinfocus-singaporemathblog.com
Take a look at a Grade 4 real-world problem from a lesson on Subtracting Fractions From Whole Numbers. This smartboard video gives step by step directions on how to solve a math word problem using a fractions bar. This is a great resource for teacher... [more]
Found by porter1526 in 4.NF.A.1
April 21, 2012 at 10:41 PM
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Not Right For WatchKnowLearn
Ages: 10 - 13
Equivalent Fractions - Khan Academy
From YouTube, produced by Salman Khan
This video is an introduction to the concept of equivalent fractions with examples. The instructor uses software to illustrate his points. (05:49)
Found by grazianione in 4.NF.A.1
July 11, 2009 at 08:45 AM
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