Decompose and Compose Fractions


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Examples, videos, and solutions to help Grade 4 students learn how to decompose and compose fractions greater than 1 to express them in various forms.

Common Core Standards: 4.NF.1, 4.NF.2, 4.NF.3, 4.NBT.6, 4.NF.4a, 4.MD.4

NYS Common Core Grade 4 Module 5, Lesson 25

Download Worksheet for Common Core Grade 4, Module 5, Lesson 25

Lesson 25 Concept Development

Problem 1: Model with a number line to convert a mixed number into a fraction greater than 1.

Problem 2: Use multiplication to convert a mixed number to a fraction.

Problem 3: Use mental math to convert a mixed number into a fraction greater than 1.

Lesson 25 Problem Set

  1. Convert each mixed number to a fraction greater than 1. Draw a number line to model your work.

  2. Convert each mixed number to a fraction greater than 1. Show your work as in the example.

  3. Convert each mixed number to a fraction greater than 1.



Lesson 25 Homework

  1. Convert each mixed number to a fraction greater than 1. Draw a number line to model your work.
    a. 3 1/4
    b. 4 2/3
    c. 5 3/8
    d. 3 7/10
    e. 6 2/9

  2. Convert each mixed number to a fraction greater than 1. Show your work as in the example.
    a. 3 3/4
    b. 5 2/3
    c. 4 1/5
    d. 3 7/8

  3. Convert each mixed number to a fraction greater than 1.
    a. 2 1/3
    b. 2 3/4
    c. 3 2/5
    d. 3 1/6
    e. 4 5/12
    f. 4 2/5
    g. 4 1/10
    h. 5 1/5
    i. 5 5/6
    j. 6 1/4
    k. 7 1/2
    l. 7 11/12


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Fraction Concoction Game



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