1. Compare Unit Fractions
MAFS.3.NF.1.3d

2. Lesson Opening
Sarah makes soup.  She divides each batch equally into thirds to give away.  Each family that she makes soup for gets 1 third of a batch.  Sarah needs to make enough soup for 5 families.  How much soup does Sarah give away?  

3. 𝟓 𝟑 batches Lesson Opening
Sarah makes soup.  She divides each batch equally into thirds to give away.  Each family that she makes soup for gets 1 third of a batch.  Sarah needs to make enough soup for 5 families.  How much soup does Sarah give away?  
𝟓 𝟑 batches
1 family
1 family
1 family
1 family
1 family
Have we fed enough families yet?
How much soup does Sarah give away?

4. Use your Fraction Tiles or Fraction Strips
Arrange each unit fraction in order from smallest to biggest.

5. Use your Fraction Tiles or Fraction Strips
Arrange each unit fraction in order from biggest to smallest.

6. What do you notice about the numbers in the fractions as they get bigger or smaller?
Turn & Talk

7. Do you think this is the same if we aren’t using fraction strips?
What if we’re talking about pizzas? Will be smaller than of a pizza?
Draw 5 equal-sized circles on your dry-erase board.

8. Do you think this is the same if we aren’t using fraction strips?
What if we’re talking about pizzas? Will be smaller than of a pizza?
1 4
1 4
1 6
1 6
1 8
1 8
1 3
1 3
1 8
1 8
1 2
1 2
1 6
1 6
1 8
1 4
1 4
1 8
1 3
1 6
1 6
1 8
1 8
Partition one into halves.
Partition one into thirds.
Partition one into fourths.
Partition one into sixths.
Partition one into eighths.
Label each unit fraction.

9. Do you think this is the same if we aren’t using fraction strips?
What if we’re talking about pizzas? Will be smaller than of a pizza?
1 4
1 4
1 6
1 6
1 8
1 8
1 3
1 3
1 8
1 8
1 2
1 2
1 6
1 6
1 8
1 4
1 4
1 8
1 3
1 6
1 6
1 8
1 8
Partition one into halves.
Partition one into thirds.
Partition one into fourths.
Partition one into sixths.
Partition one into eighths.
Which unit fraction is the smallest?
What happens to the size of the piece
the more partitions we make?
Which unit fraction is the largest?

10. to your fraction strips.
1 2
1 2
1 3
Compare your drawings
to your fraction strips.
What do you notice?
1 3
1 3
1 4
1 4
1 4
1 4
Turn & Talk
1 6
1 6
1 6
1 6
1 8
1 8
1 6
1 6
1 8
1 8
1 8
1 8
1 8
1 8

11. Your Turn - Part 1 (on your dry-erase boards):
Work with a partner
Each partner chooses a unit fraction from their fraction tiles (or fraction strips)
Compare the fractions
Both partners write the comparison on their dry- erase boards
1 3 > 1 6

12. Your Turn - Part 2 (on your dry-erase boards):
Work with a partner
Partner 1 chooses a unit fraction
Partner 2 chooses < or >
Partner 1 then has to write a unit fraction that makes the comparison true
Partners 1 and 2 switch roles
1 4
1 8
>

13. Your Turn – Part 3 (Practice Pages)

14. Lesson Closing
When you are comparing unit fractions, is there a rule for how to determine which fraction is greater?

15. Use the gridded response form for both questions.
Exit Ticket
Use the gridded response form for both questions.
Write the largest fraction on your gridded response form.
2. Name a unit fraction smaller than
1 8 , 1 2 , 1 4 , 1 3