# Contents

1. Section A: Reason with Fractions
1. Warm-up: Number Talk: Fluency and Fractions
2. 1.1: Let’s Make Head Wraps!
3. 1.2: Make 2 Yards of Fabric
4. 1.3: Play by the Rules
1. Warm-up: Number Talk: Wholes and Units
2. 2.1: Straws for A Roller Coaster
3. 2.2: Tall Enough for a Ride?
1. Warm-up: Number Talk: One Whole, Many Names
2. 3.1: Relay Race at Recess
3. 3.2: You Be the Author
2. Section B: Whole-number Operations
1. Warm-up: Number Talk: Differences
2. 4.1: Lots of Zeros
3. 4.2: Ways of Finding Differences
1. Warm-up: Estimation Exploration: A Silly Riddle
2. 5.1: Two Methods Revisited
3. 5.2: Two by Two
1. Warm-up: Number Talk: Divide by 3 and by 6
2. 6.1: Unfinished Divisions
3. 6.2: Where Do We Begin?
3. Section C: Solve Problems with Multiplication and Division
1. Warm-up: Notice and Wonder: Two Cities
2. 7.1: The Most and Least Expensive
3. 7.2: The Cost of Living
1. Warm-up: Number Talk: Divide by 8
2. 8.1: Two Truths and a Lie, or Two Lies and a Truth?
3. 8.2: Buses for a Field Trip
1. Warm-up: Number Talk: Difference and Thousands
2. 9.1: What’s the Question?
3. 9.2: What’s the Problem?
4. Section D: Creation and Design
1. Warm-up: Estimation Exploration: No Driver Required
2. 10.1: Dental Care
3. 10.2: Get Your Classmates to Estimate
4. 10.3: Facilitate Your “Estimation Exploration” Activity
1. Warm-up: Which One Doesn’t Belong: Strings of Numbers
2. 11.1: Add One That Doesn’t Belong
3. 11.2: Add Two That Don’t Belong
4. 11.3: Add Three That Don’t Belong
1. Warm-up: Number Talk: A Whole Number and a Fraction
2. 12.1: Related Numbers, Related Expressions
3. 12.2: Add One New Expression, Then Two
4. 12.3: Add Three New Expressions
5. Glossary