# Contents

1. Section A: Multiply and Divide Whole Numbers
1. Warm-up: Notice and Wonder: Digits
3. 1.2: More Digits
1. Warm-up: Estimation Exploration: Large Product
2. 2.1: Kiran’s Work
3. 2.2: Zero the Hero
1. Warm-up: Number Talk: Increasing Factors
2. 3.1: Choose a Multiplication Strategy
3. 3.2: Compare Strategies
1. Warm-up: Notice and Wonder: Blank Spaces
2. 4.1: Reasonable Estimates
3. 4.2: Missing Dividends and Divisors
1. Warm-up: Estimation Exploration: Large Quotient
2. 5.1: Elena’s Work
3. 5.2: Partial Quotients Practice
4. Section A Summary
2. Section B: Apply Volume Concepts
1. Warm-up: Estimation Exploration: Sugar Cubes
2. 6.1: 126 Cubes
3. 6.2: Colossal Structures Old and New
1. Warm-up: Notice and Wonder: Radio Flyer
2. 7.1: Anatomy of an Estimate
3. 7.2: Estimating the Size of the Radio Flyer
1. Warm-up: Notice and Wonder: Toy Boxes
2. 8.1: Sand Wagon
3. 8.2: More Boxes
1. Warm-up: Notice and Wonder: Cubic Centimeters and Grams
2. 9.1: Catching Rainfall
3. 9.2: How Much Water?
4. Section B Summary
3. Section C: Fraction and Decimal Operations
1. Warm-up: Number Talk: Adding Fractions
2. 10.1: Greatest Sum
3. 10.2: Smallest Sum
1. Warm-up: Number Talk: Subtracting Fractions
2. 11.1: Greatest Difference
3. 11.2: What is the Smallest Difference?
1. Warm-up: True or False: Adding Decimals
2. 12.1: Race to One or One Tenth
3. 12.2: Decimal Race to 500
1. Warm-up: Number Talk: Multiply One Third
2. 13.1: Fraction Multiplication Compare
3. 13.2: Fraction Multiplication Compare Round 2
4. Section C Summary
4. Section D: Creation and Design
1. Warm-up: Notice and Wonder: Sharing Bread
2. 14.1: Design Your Notice and Wonder
3. 14.2: Facilitate Your Notice and Wonder
4. 14.3: Design Your Notice and Wonder, Part 2
1. Warm-up: Estimation Exploration: Umbrellas
2. 15.1: Design Your Estimation Exploration
3. 15.2: Facilitate Your Estimation Exploration
1. Warm-up: Number Talk: Division
2. 16.1: Number Talk: Design 1
3. 16.2: Number Talk: Design 2
4. 16.3: Number Talk: Design 3
1. Warm-up: True or False: Fraction Addition
2. 17.1: True or False: Design 1
3. 17.2: Design 2
4. 17.3: Design 3
1. Warm-up: Which One Doesn’t Belong? Volume
2. 18.1: Which One Doesn't Belong? Design 1
3. 18.2: Which One Doesn't Belong? Design 2
4. 18.3: Which One Doesn't Belong? Design 3
5. Glossary