Tool:
Subtracting with Uncommon Denominators 
Screenshot:

Go to: 
http://www.conceptuamath.com/fractions.html#AddingUD
(opens a new window)

Description: 
This interactive tool is one of a series of tools created by Conceptua Math that are designed for teacherfacilitated instruction. Teachers can use the Adding Fractions with Uncommon Denominators tool to help students understand the terms "common denominators'' and ''uncommon denominators.'' Students learn how to determine a common denominator for two given fractions with uncommon denominator by multiplying one or both by a fraction with a value of 1prior to subtracting one fraction from another. Features such as dragging, hide/show models and linking models to procedures assist students in connecting conceptual understanding to the procedure of subtraction in a systematic and clear sequence when teachers begin by working with models only, models and numbers and then numbers only. Designed to work on an interactive white board.

Technology Type: 
Flash  
Author: 
Conceptua Math 
Language: 
English  
Cost: 
Does not require payment for use 

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Courses: 
Math 5 
Subtracting fractions 
 Math 6 
Subtracting fractions 
 Math 7 
Subtracting fractions 
