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T.I.P.S.

Students must be able to represent and solve addition and subtraction problems involving different denominators. Even though the denominators are different, they are a part of the same whole.

Example

Find the sum of 1 1/3+ 5/6+ 1/2 . Create a pictorial model for the problem, explain your thinking, and verify your answer using the Associative Property of Addition.

Hint
Possible Solution

Digital Tools

Click on the following links for interactive games.

Adding Unlike Denominators with Models
Adding Fractions with Unlike Denominators
Subtracting Unlike Denominators with Models
Subtracting Fractions with Unlike Denominators
Adding & Subtracting Fractions with Unlike Denominators Word Problems

Resources

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TEKS

Supporting Standard

5.3 Number and operations. The student applies mathematical process standards to develop and use strategies and methods for positive rational number computations in order to solve problems with efficiency and accuracy. The student is expected to:

(H) represent and solve addition and subtraction of fractions with unequal denominators referring to the same whole using objects and pictorial models and properties of operations

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