Chapter 8- Two-Digit Addition and Subtraction

Lesson 8.1- Add and Subtract within 20

• Objective-Add and Subtract within 20.
• Question- What strategies can you use to add and subtract?
• Homework Video-

Lesson 8.2-Hands On- Add Tens

• Objective- Draw a model to add tens.
• Question- How can you add tens?
• Homework Video-

Lesson 8.3-Hands on- Subtract Tens

• Objective- Draw a model to subtract tens.
• Question- How can you subtract tens?
• Homework Video-

Lesson 8.4-Use a Hundred Chart to Add

• Objective-Use a hundred chart to find sums.
• Question-How can you use a hundred chart to count on by ones and tens?
• Homework Video-

Lesson 8.5-Hands on- Use Models to Add

• Objective- Use concrete models to add ones or tens to a two-digit number.
• Question-How can models help you add ones or tens to a two-digit number?
• Homework Video-

Lesson 8.6-Hands on- Make Ten to Add

• Objective-Make a ten to add a two-digit number and a one-digit number.
• Question-How can making a ten help you add a two-digit number and a one-digit number?
• Homework Video-

Lesson 8.7-Hands on- Use Place Value to Add

• Objective- Use tens and ones to add two-digit numbers.
• Question-How can you model tens and ones to help you add two-digit numbers?
• Homework Video-

Lesson 8.8- Problem Solving- Addition Word Problems

• Objective-Solve and explain two-digit addition word problems using the strategy draw a picture.
• Question- How can drawing a picture help you explain how to solve an addition problem?
• Homework Video-

Lesson 8.9- Practice Addition and Subtraction

• Objective-Add and subtract within 100, including continued practice with facts within 20.
• Question- What different ways can you use to add and subtract?
• Homework Video-

 Chapter 8 Review

• Homework Video-