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Whole Number Fractions


Videos and solutions to help Grade 3 students learn how to express whole number fractions on the number line when the unit interval is 1.

Common Core Standards: 3.NF.3a, 3.NF.3b, 3.NF.3c

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Lesson Plans and Worksheets for Grade 3

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Common Core For Grade 3

New York State Common Core Math Module 5, Grade 3, Lesson 25

Lesson 25 Application Problem

Linc drinks 1 eighth gallon of milk every morning.

a. How many days would it take for him to drink 1 gallon of milk?
Use a number line and words to explain your answer.

b. How many days would it take him to drink 2 gallons?
Extend your number line to show 2 gallons and use words to explain your answer.

Lesson 25 Concept Development

Each rectangle represents 1 whole. Partition the first rectangle into thirds.
Write the whole as a fraction below it.
3/3 = 1 whole

Now partition the second rectangle into halves. Label the whole as a fraction below it.
2/2 = 1 whole

Now partition the third rectangle into wholes.
What do you mean? It is already a whole. That means 0 partitions!
1 whole as a fraction is to write it as 1/1
We didn’t split it into more parts, so the whole is still in 1 piece, and we’re counting that 1 piece.

Using a number line, tell the difference between 2/1 and 2/2
2/2 means one whole. 2/1 means 2 wholes.

Lesson 25 Homework

1. Label the following models as a fraction inside the boxes.
2. Fill in missing whole numbers. Then rename the wholes in the boxes.
3. Explain the difference between these fractions using a number line, pictorial model, or words.


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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