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# Unit Overview: Addition and subtraction of 2-digit numbers (regrouping and adjusting)

## Lessons:

15 lessons

### Make 10

In this lesson, we will learn how to use the "Make ten strategy" to add ones.

• 1 Quiz
• 23m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Adding two digit numbers and ones with regrouping

In this lesson, we will learn how the make ten strategy can help us add two digit numbers with one digit numbers.

• 2 Quizzes
• 15m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Adding two digit numbers with regrouping

In this lesson, we will learn how to add two, two digit numbers by partitioning one number and partitioning both numbers.

• 2 Quizzes
• 24m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Adding two digit numbers involving regrouping

In this lesson, we will learn how to add 2 digit numbers by partitioning one or both numbers.

• 2 Quizzes
• 15m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Using the Make 10 strategy to subtract ones

In this lesson, we will learn how to use the "Make 10" Strategy to help us subtract ones from 2 digit numbers.

• 2 Quizzes
• 17m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Subtracting a 2 digit number and ones with regrouping

In this lesson, we will learn how to subtract two digit numbers and ones with regrouping by using a part whole model to help us.

• 2 Quizzes
• 14m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Subtracting 2 digit numbers involving regrouping

In this lesson, we will learn how to subtract two digit numbers by using dienes cubes to represent our mental calculations.

• 2 Quizzes
• 15m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Subtracting 2 digit numbers with regrouping

In this lesson, we will learn how to subtract 2 digit numbers using number lines to represent our mental calculations.

• 2 Quizzes
• 14m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Word problems: Whole-part models

In this lesson, we will learn how to use whole-part models to help us solve addition and subtraction word problems.

• 2 Quizzes
• 12m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Word Problems: Bar models

In this lesson, we will learn how to solve addition and subtraction word problems with the help of bar models.

• 2 Quizzes
• 11m Video
• Presentation(PPT)
• Worksheet
• Transcript

In this lesson, we will learn how to use the "Round and Adjust" strategy to help us solve addition equations.

• 2 Quizzes
• 12m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Round and Adjust with Subtraction

In this lesson, we will learn how to use the "Round and Adjust" strategy to help us solve subtraction equations.

• 2 Quizzes
• 11m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Near doubles

In this lesson, we will learn how to add near doubles.

• 2 Quizzes
• 15m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Mixed Strategies for Addition and Subtraction

In this lesson, we will solve addition and subtraction equations using a variety of strategies.

• 2 Quizzes
• 6m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Addition and Subtraction Word Problems

In this lesson, we will solve addition and subtraction word problems.

• 2 Quizzes
• 9m Video
• Presentation(PPT)
• Worksheet
• Transcript