### To add by counting on using a number line

In this lesson, we will learn how to use 'first, then, now' stories to add by counting on, using a number line.

Skip navigation# Unit Overview: Addition and subtraction within 20

## Lessons:

### To add by counting on using a number line

### To subtract by counting back using a number line

### To add a 1-digit number to a teens number using a known fact

### To subtract a 1-digit number from a teens number using a known fact

### To use the 'Make ten' strategy to add two 1-digit numbers (Part 1)

### To use the 'Make ten' strategy to add two 1-digit numbers (Part 2)

### To use the 'Make ten' strategy to subtract a 1-digit number from a teen number (Part 1)

### To use the 'Make ten' strategy to subtract a 1-digit number from a teen number (Part 2)

### To use mathematical models and strategies for addition

### To use mathematical models and strategies for subtraction

10 lessons

In this lesson, we will learn how to use 'first, then, now' stories to add by counting on, using a number line.

In this lesson, we will learn how to use 'first, then, now' stories to subtract by counting back, using a number line.

In this lesson, we will learn how we can add a teens number using known number bonds.

In this lesson, we will learn how we can subtract from a teens number using known number bonds.

In this lesson, we will identify expressions that are less than, equal to and greater than 10 and then apply the 'Make ten' strategy to add numbers.

In this lesson, we will practise using the 'Make ten' strategy to solve addition equations.

In this lesson, we will connect the 'Make ten' strategy to subtraction and apply it to subtraction equations.

In this lesson, we will practise using the 'Make ten' strategy to solve subtraction equations.

In this lesson, we will explore mathematical problems in context and consider different solutions.

In this lesson, we will explore mathematical problems in context and consider different solutions.

Units in Maths

- Numbers to 10
- Addition and subtraction within 10
- Shape and patterns
- Numbers to 20
- Addition and subtraction within 20
- Time
- Exploring calculation strategies within 20
- Numbers to 50
- Addition and subtraction within 20 (comparison)
- Fractions
- Measures (1): Length and mass
- Numbers 50 to 100 and beyond
- Addition and subtraction (applying strategies)
- Money
- Multiplication and division
- Measures (2): Capacity and volume
- Addition and Subtraction
- Multiplication and money
- Numbers within 100
- Addition and subtraction of 2-digit numbers
- Addition and subtraction word problems
- Measures: Length
- Graphs
- Multiplication and division: 2, 5 and 10
- Time
- Fractions
- Addition and subtraction of 2-digit numbers (regrouping and adjusting)
- Money
- Faces, shapes and patterns; lines and turns
- Numbers within 1000
- Measures: Capacity and volume
- Measures: Mass
- Exploring calculation strategies
- Multiplication and division: 3 and 4
- Multiplication: equal and unequal groups
- The two times table

- Doubling and halving
- Addition and subtraction within 10
- Exploring calculation strategies within 20
- Money
- Measures
- 2-D shape, perimeter and area
- Numbers to 50
- Manipulating and calculating with fractions
- Fractions
- Fractions and decimals
- Conceptualising and comparing fractions
- Numbers 50 to 100 and beyond
- Reasoning with large whole numbers
- Converting units of measure
- Numbers to 10
- Solving measure and money problems
- Addition and subtraction within 20
- Addition and subtraction (applying strategies)
- Numbers within 1000
- Place value
- Problem solving with integer addition and subtraction
- Volume
- Positive and negative numbers
- Numbers within 10
- Numbers within 15
- Addition and subtraction within 20
- Measures (1): Length and mass
- Measures (2): Capacity and volume
- Addition and subtraction of 2-digit numbers
- Fractions
- Multiplication and division
- Multiplication and division
- Axioms and arrays
- Prime factor decomposition
- Indices and standard form
- Time
- Addition and subtraction of 2-digit numbers (regrouping and adjusting)
- Area and perimeter
- Numbers and numerals
- Percentages
- Fractions
- Measures: Length
- Numbers beyond 20
- Time
- Securing multiplication facts
- Addition and subtraction within 10
- Measures: Mass
- Number sense and exploring calculation strategies
- Addition and subtraction
- Securing multiplication and division
- Position and Direction
- Pattern and Early Number
- Addition and subtraction word problems
- Fractions
- Decimals
- Multiplication and division: 3 and 4
- Multiplication and division: 2, 5 and 10
- Measures: Capacity and volume
- Addition and subtraction
- Extending calculation strategies and additive reasoning
- Deriving multiplication and division facts
- Calculating with whole numbers and decimals
- Integers & Decimals
- Multiplication and division
- Grouping and Sharing
- Surds and trigonometry
- Numbers within 6
- Numbers within 100
- Exploring calculation strategies
- Time
- Exploring calculation strategies and place value
- Multiplication and division
- Factors and multiples
- Graphs
- Graphs
- Reasoning with 4-digit numbers
- Reasoning with patterns and sequences
- Calculation problems
- Numbers within 20
- Money
- Multiplication and division
- Fractions, decimals and percentages
- Decimals and measures
- Early Mathematical Experiences
- Order of operations
- Depth of numbers within 20
- Numbers to 20
- Addition and subtraction within 20 (comparison)
- Addition and subtraction within 6
- Accuracy and estimation
- Money
- Length and perimeter
- Fractions
- Fractions
- Problem solving with whole numbers and decimals