4.NF.B.3a

Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.

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Ages: 8 - 14
6585 Views:
Diffy - Virtual Manipulative
From usu.edu, produced by Utah State University
When Diffy opens, there are four black numbers placed at the corners of a black square. Your first goal is to fill in the four blanks in the blue circles in the middle of each side of the black square. Start with any side of the black square and cli... [more]
May 9, 2010 at 11:11 AM
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Not Right For WatchKnowLearn
Ages: 9 - 15
3281 Views:
Adding & Subtracting Fractions
From YouTube, produced by LearnBetterNow.com
Instructor uses a whiteboard to demonstrate how to add and subtract fractions. In the first part of the video they add with like denominators, then they reduce the fraction. Then they add with unlike denominators, first they find the lowest common mu... [more]
Found by Barb in 4.NF.B.3a
August 4, 2009 at 07:28 PM
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Not Right For WatchKnowLearn
Ages: 10 - 15
2047 Views:
Adding and Subtracting Fractions / Mixed Numbers: Example 3
From YouTube, produced by Patrick
Adding and Subtracting Fractions / Mixed Numbers: Example 3. In this video, the instructor shows how to add / subtract fractions that have different denominators at the beginning. (04:02)
February 20, 2012 at 02:26 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
3420 Views:
The Four Rules of Fractions
From SlideShare, produced by Steve Bishop
The four rules - adding, subtracting, division and multiplication - with fractions. This is an excellent slideshow. The teacher or the student can control how fast the presentation should be. The presenter gives the rule in one slide and the student ... [more]
July 21, 2011 at 01:29 PM
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Not Right For WatchKnowLearn
Ages: 8 - 13
4021 Views:
Fractions - Add, Subtract, Multiply and Divide
From SlideShare, produced by SandraTeer
This is a slideshow in which the instructor shows adding, subtracting, multiplying, and dividing fractions step by step. There is no sound. (24 slides)
July 21, 2011 at 01:40 PM
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Not Right For WatchKnowLearn
Ages: 10 - 15
1043 Views:
Adding and Subtracting Fractions and Mixed Numbers
From YouTube, produced by mbrandl11
The instructor uses an electronic sketchpad to demonstrate the process to add or subtract fractions and mixed numbers. It includes four examples.
January 23, 2010 at 04:01 PM
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Not Right For WatchKnowLearn
Ages: 9 - 13
2333 Views:
Number Line Bars - Fractions - Virtual Manipulative
From usu.edu, produced by Utah State University
This is a very versatile tool that can be used to illustrate a variety of number operations. The background of the workspace is marked by light gray grid lines. The default step-size of the grid lines is 1/10 unit. There are more instructions on the ... [more]
May 9, 2010 at 12:35 PM
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