Lesson 2: Subtraction

• 4-Digit Subtraction Across Zeros

Lesson 3: Other Ways to Add and Subtract — Part 1

• Subtract with Regrouping Mentally (Lessons 3-4)

Lesson 3: Other Ways to Add and Subtract — Part 1

• Subtract 3-Digit Numbers Mentally with Compensation (Lessons 3-4)

Lesson 3: Other Ways to Add and Subtract — Part 1

• Add 3-Digit Numbers Mentally with Compensation  (Lessons 3-4)

Lesson 5: Word Problems

• Word Problems: Bar Models: 2-Step Subtraction Word Problems

Use the following educator videos to support learning in this chapter:

• Developing Addition Algorithms 
• Developing Subtraction Algorithms

Available Resources:

Day Zero: Grades 3-5

• Roll to Zero (from a Hundred)
• Roll to Zero (from a Thousand)
• Make a Thousand

Addition and Subtraction with and without Regrouping

• Count Down to Zero from 100 with Modifications
• Subtraction with Regrouping with Number Bonds
• Missing Digits in Addition
• Missing Digits in Subtraction

Addition and Subtraction Fluency Resources

• Tens and Ones: Addition and Subtraction within 20

School Trip Performance Task

Shopping Trip Performance Task