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# Unit Overview: Exploring calculation strategies and place value

## Lessons:

10 lessons

### Applying a range of strategies to mentally calculate addition

In this lesson, we will use mental strategies such as partitioning and adjustment to multiples of ten to add a range of two digit numbers together. .

• 1 Quiz
• 21m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Applying a range of strategies to mentally calculate subtraction

In this lesson, we will use different mental strategies to calculate subtraction such as partitioning, counting on and using known facts.

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

### Applying addition and subtraction strategies within context

In this lesson, we will be implementing a variety of addition and subtraction strategies to real world scenarios.

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

### Using commutativity and associativity to multiply

In this lesson, we will explore the laws of multiplication, and use known facts and the laws of commutativity and associativity to perform efficient multiplication.

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

### Using doubling or halving to calculate efficiently

In this lesson, we will use doubling and halving skills to efficiently calculate multiplication and division involving a factor of 2.

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

### Identifying values in four digit numbers

In this lesson, we will extend our knowledge of place value into the thousands place, and look at unit conversions that require knowledge of four digit numbers.

• 2 Quizzes
• 19m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Comparing four digit numbers

In this lesson, we will use place value knowledge to count in hundreds, investigate the number 1000 and compare the value of each digit in different four digit numbers.

• 2 Quizzes
• 19m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Comparing and ordering four digit numbers

In this lesson, we will use place value knowledge to compare four digit numbers and place them in ascending and descending order of size.

• 2 Quizzes
• 19m Video
• Presentation(PPT)
• Worksheet
• Transcript

In this lesson, we will learn how to add and subtract 1000 using our understanding of place value. We will also investigate a range of visual representations of subtraciton.

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

### Rounding to the nearest multiple of 1000

In this lesson, we will learn to round four digit numbers to the nearest multiple of 1000 using different visual representations such as number lines and bead strings.

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