Contents

1. Section A: Equal Groups of Fractions
2. Lesson 1: Equal Groups of Unit Fractions
   1. Warm-up: How Many Do You See: Oranges
   2. 1.1: Crackers, Kiwis, and More
   3. 1.2: What Could It Mean?
3. Lesson 2: Representations of Equal Groups of Fractions
   1. Warm-up: Number Talk: Three, Six, Nine, Twelve
   2. 2.1: Card Sort: Expressions and Diagrams
   3. 2.2: Different Representations
4. Lesson 3: Patterns in Multiplication
   1. 3.1: Describe the Pattern
   2. 3.2: What's Missing?
5. Lesson 4: Equal Groups of Non-Unit Fractions
   1. Warm-up: Notice and Wonder: Thirds
   2. 4.1: Jars of Jam
   3. 4.2: How Do We Multiply?
6. Lesson 5: Equivalent Multiplication Expressions
   1. Warm-up: How Many Do You See?
   2. 5.1: Complete the Equations
   3. 5.2: Fractions and Matching Expressions
7. Lesson 6: Problems with Equal Groups of Fractions
   1. Warm-up: True or False: Two and Three Factors
   2. 6.1: Banana Bread Recipe
   3. 6.2: How Much Milk Was Used?
   4. Section A Summary
   5. Section A Practice Problems
8. Section B: Addition and Subtraction of Fractions
9. Lesson 7: Fractions as Sums
   1. 7.1: Barley Soup
   2. 7.2: Sums in Fifths and Thirds
10. Lesson 8: Addition of Fractions
    1. Warm-up: Notice and Wonder: A Fraction on a Number Line
    2. 8.1: Sum of Jumps
    3. 8.2: What is the Sum?
    4. 8.3: Make Two Jumps
11. Lesson 9: Differences of Fractions
    1. Warm-up: True or False: Sums of Tenths
    2. 9.1: Jump to Subtract
    3. 9.2: What’s the Difference?
    4. 9.3: Make a Jump, Subtraction Edition
12. Lesson 10: The Numbers in Subtraction
    1. Warm-up: Number Talk: Groups of Twelfths
    2. 10.1: What’s Left?
    3. 10.2: Card Sort: Twelfths
13. Lesson 11: Subtract Fractions Flexibly
    1. Warm-up: Which One Doesn’t Belong: Fractional Values
    2. 11.1: Friendship Bracelets
    3. 11.2: Multiple Ways to Subtract
14. Lesson 12: Sums and Differences of Fractions
    1. Warm-up: Number Talk: Subtract Some Eighths
    2. 12.1: Make It True
    3. 12.2: To Decompose or Not to Decompose
15. Lesson 13: Fractional Measurements on Line Plots
    1. Warm-up: Notice and Wonder: Which Ruler?
    2. 13.1: Measure to the Nearest \frac59{4} and \frac59{8} Inch
    3. 13.2: Colored-pencil Measurements
    4. 13.3: Noah's Colored Pencils
16. Lesson 14: Problems about Fractional Measurement Data
    1. Warm-up: Notice and Wonder: Shoe Sizes
    2. 14.1: Shoe Lengths
    3. 14.2: Larger Shoes, Anyone?
    4. Section B Summary
    5. Section B Practice Problems
17. Section C: Addition of Tenths and Hundredths
18. Lesson 15: An Assortment of Fractions
    1. Warm-up: Which One Doesn't Belong: Halves, Fourths, Sixths, and Eights
    2. 15.1: All the Way to the Top
    3. 15.2: Stacks of Blocks
19. Lesson 16: Tenths and Hundredths, Together
    1. Warm-up: Notice and Wonder: Shaded Rectangles and Squares
    2. 16.1: Tenths and Hundredths
    3. 16.2: Walk, Stop, and Sip
20. Lesson 17: Sums of Tenths and Hundredths
    1. Warm-up: Which One Doesn’t Belong: Tenths and Hundredths
    2. 17.1: Card Sort: Less Than, Equal to, or Greater Than 1?
    3. 17.2: What’s Missing?
    4. 17.3: Fraction Action: Tenths, Hundredths
21. Lesson 18: Lots of Fractions to Add
    1. Warm-up: Number Talk: A Bunch of Numbers
    2. 18.1: Stack Centavos and Pesos
    3. 18.2: More Than Two Fractions
    4. Section C Summary
22. Lesson 19: Flexible with Fractions
    1. Warm-up: Notice and Wonder: Sticky Notes
    2. 19.1: Sticky-note Designs
    3. 19.2: Hiking Trails
    4. 19.3: Find a Match
23. Lesson 20: Sticky Notes
    1. Warm-up: Which One Doesn’t Belong: Sticky Notes
    2. 20.1: Estimation Exploration: Sticky Notes
    3. 20.2: Design Your Initial
    4. Section C Practice Problems
24. Glossary
25. Attributions
    1. Image Attributions
26. Notes
27. Notes