# Contents

1. Section A: Multi-digit Multiplication Using the Standard Algorithm
1. Warm-up: Number Talk: A Multiple of 10
2. 1.1: Reasonable Estimates
3. 1.2: Multiply by 18
1. Warm-up: Which One Doesn't Belong: Diagrams to Find Products
2. 2.1: Decompose in Many Ways
3. 2.2: Calculate in Many Ways
1. Warm-up: Which One Doesn't Belong: Multiplying Large Numbers
2. 3.1: Partial Products Everywhere
3. 3.2: Record Partial Products
1. Warm-up: Number Talk: Partial Product
2. 4.1: Compose with the Standard Algorithm
3. 4.2: Use the Standard Algorithm
1. Warm-up: Number Talk: Partial Products
2. 5.1: Compare Two Algorithms
3. 5.2: Use the Standard Algorithm
1. Warm-up: Number Talk: Three Factors
2. 6.1: Compose a New Unit
3. 6.2: All the Products
1. Warm-up: Notice and Wonder: Same Solution
2. 7.1: Greatest Product
3. 7.2: Desperately Seeking 9 New Units
1. Warm-up: Number Talk: The Distributive Property
2. 8.1: Fluency Practice Choice Time
3. 8.2: Targeted Products
1. Warm-up: Notice and Wonder: For the Birds
2. 9.1: Home is Where the Bird Lives
3. 9.2: What is the Volume?
4. Section A Summary
5. Section A Practice Problems
2. Section B: Multi-digit Division Using Partial Quotients
1. Warm-up: How Many Do You See: World Record Event
2. 10.1: How Many Groups of 8 Dancers?
3. 10.2: More Groups of Dancers
1. Warm-up: Notice and Wonder: Ways to Record
2. 11.1: Division Expressions
3. 11.2: Choose Your Own Partial Quotients
1. Warm-up: Notice and Wonder: Incomplete Solution
2. 12.1: Elena’s Work
3. 12.2: Complete the Solution
1. Warm-up: Number Talk: Divide
2. 13.1: Compare Solutions
3. 13.2: Estimate and Solve
1. Warm-up: Which One Doesn’t Belong: Different Ways
2. 14.1: Find the Mistake
3. 14.2: Practice Problems
1. Warm-up: Estimation Exploration: The Garden
2. 15.1: Find the Missing Side Length, Part 1
3. 15.2: Find the Missing Side Length, Part 2
4. Section B Summary
1. Warm-up: Notice and Wonder: World Record Event
2. 16.1: How Many Feet in One Serving?
3. 16.2: Han's Estimate
1. Warm-up: What Do You Know About \frac{60}{6} + \frac{6}{6} ?
2. 17.1: Select Expressions
3. 17.2: Choose One Expression
4. Section B Practice Problems
3. Section C: Let’s Put it to Work
1. Warm-up: Estimation Exploration: How Big is the Milk Carton?
2. 18.1: Milk for Everyone
3. 18.2: How Big is 1,000,000?
1. Warm-up: Notice and Wonder: Trash and Ice
2. 19.1: Square Kilometers
3. 19.2: So Much Trash
1. Warm-up: Number Talk: Three Factors
2. 20.1: What a Waste
3. 20.2: Plastic Palooza
1. Warm-up: Notice and Wonder: Food Waste
2. 21.1: Food Waste in the United States
3. 21.2: Food Journal
4. 21.3: Analyze Food Journals
5. Section C Practice Problems
4. Glossary
1. Image Attributions
5. Citations
6. Notes
7. Notes