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Tool: Pan Balance - Number
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Description: Use this tool to strengthen understanding and computation of numerical expressions and equality. In understanding equality, one of the first things students must realize is that equality is a relationship, not an operation. Many students view "=" as "find the answer." For these students, it is difficult to understand equations such as 11 = 4 + 7 or 3 5 = 17 2.
Technology Type: Computer 
Author: NCTM: Illuminations
Language: English 
Cost: Does not require payment for use

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Comment:excellent to help students understand equality in equations