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lesson 24
1 hour

Decompose And Compose Fractions Greater Than 1


Description

Objective:  Decompose and compose fractions greater than 1 to express them in various forms.

In Lessons 24 and 25, students use decompositions to reason about the various equivalent forms in which a fraction greater than or equal to 1 may be presented, both as fractions and as mixed numbers. In Lesson 24, they decompose, for example, 11 fourths into 8 fourths and 3 fourths, 11/4 = 8/4 + 3/4 , or they can think of it as 11/4 = 4/4 + 4/4 + 3/4 = 2 × 4/4 + 3/4 = 2 3/4.

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Credits

From EngageNY.org of the New York State Education Department. Grade 4 Mathematics Module 5, Topic E, Lesson 24. Available from engageny.org/resource/grade-4-mathematics-module-5-topic-e-lesson-24; accessed 2015-05-29.
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