Decompose Whole Number Fractions
Common Core Standards: 3.NF.3a, 3.NF.3b, 3.NF.3c
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Lesson Plans and Worksheets for Grade 3
Lesson Plans and Worksheets for all Grades
More Lessons for Grade 3
Common Core For Grade 3
New York State Common Core Math Grade 3, Module 5, Lesson 26
Application Problem
Antonio works on his project for 4 thirds of an hour. His mom tells him that he must spend another 2 thirds
hour on it.
Draw number bonds and a number line with copies of thirds to show how long Antonio worked altogether.
Concept Development
Use number bonds to decompose fractions.
1. Partition the number line to show the unit fractions. Then draw number bonds with copies of 1 whole for the circled whole numbers.
2. Write the fraction that names the whole numbers for each unit fraction. The first one has been done for you.
3. Rider dribbles the ball down 1/3 of the basketball court on the first day of practice. Each day after that he dribbles 1/3 of the way more than he did the day before.
Draw a number line to represent the court. Partition the number line to represent how far Rider dribbles on Day 1, Day 2, and Day 3 of practice. What fraction of the way does he dribble on Day 3?
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