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# Unit Overview: Addition and subtraction within 10

## Lessons:

10 lessons

### Combining sets (count all)

In this lesson, we will be combining sets, by counting all of the items in that set. We will practice writing addition equations.

• 1 Quiz
• 13m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Combining sets (count on)

In this lesson, we will continue to explore combining sets, by counting on from an amount. We will practice writing equations to express this.

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

This lesson will explore how addition can be linked to problem solving contexts. We will be applying the previously learnt strategies to solve problems.

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

### Understanding commutativity

In this lesson, we will explore commutativity - the concept that parts in addition equations can be added together in any order.

• 2 Quizzes
• 16m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Subtracting by partitioning

In this lesson, we will learn to subtract by partitioning a whole into parts.

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

### Counting back in ones to subtract

In this lesson, we will practice subtracting by counting back in ones. We will do this with the support of a number line.

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

### Linking subtraction equations to problem solving contexts

In this lesson, we will explore how subtraction can be linked to problem solving contexts. We will be applying the previously learnt strategies to solve problems.

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

### Recognising the relationship between addition and subtraction

In this lesson, we will explore how addition and subtraction are linked, and how a part whole relationship can produce related facts.

• 2 Quizzes
• 18m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Exploring problems involving addition and subtraction

In this lesson, we will problem solve to complete missing number triangles! We will practice adding and subtracting to find the answers.

• 1 Quiz
• 19m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Exploring further problems involving addition and subtraction

In this lesson, we will problem solve to uncover secret jumps! We will practice adding and subtracting to find the answers.

• 16m Video
• Presentation(PPT)
• Worksheet
• Transcript