### Exploring 2-digit numbers by grouping in tens

In this lesson, we will group 2-digit numbers in tens and ones and using strategies to solve problems.

Skip navigation# Unit Overview: Numbers within 100

## Lessons:

### Exploring 2-digit numbers by grouping in tens

### Identifying tens and ones in a 2-digit number

### Partitioning 2-digit numbers (Part 1)

### Partitioning 2-digit numbers (Part 2)

### Exploring the components of numbers within 100

### Representing 2-digit numbers (Part 1)

### Representing 2-digit numbers (Part 2)

### Comparing numbers within 100 on a number line

### Comparing 2-digit numbers

### Ordering numbers within 100

### Practising finding one more and one fewer and ten more and ten fewer

### Identifying number patterns

### Exploring odd and even numbers (Part 1)

### Exploring odd and even numbers (Part 2)

### Revisiting numbers within 100

15 lessons

In this lesson, we will group 2-digit numbers in tens and ones and using strategies to solve problems.

In this lesson, we will use resources to show how many tens and ones there are in a 2-digit number.

In this lesson, we will use resources to partition 2-digit numbers into tens and ones and representing this in a part-whole model.

In this lesson, we will use resources to partition a 2-digit number into tens and ones in a variety of ways.

In this lesson, we will represent the number 100 so that we can understand that the number 100 is equal to ten groups of ten.

In this lesson, we will represent how many tens and ones there are in numbers within 100 in different ways and then representing these numbers on a number line.

In this lesson, we will explore different written representations of numbers up to 100 and making connections between the written numerals and written word representations.

In this lesson, we will find missing numbers in a sequence and estimating where we think a number would go on an unmarked blank number line.

In this lesson, we will represent 2-digit numbers, comparing the tens and ones in 2-digit numbers and identifying which number is greater or less.

In this lesson, we will compare 2-digit numbers, identifying which is greater or less and putting numbers in increasing and decreasing order.

In this lesson, we will use representations to help us find one more and one fewer and ten more and ten fewer for numbers within 100 and spot patterns in what changes when we add or subtract 1 or 10.

In this lesson, we will count in threes, forwards and backwards and identify patterns when skip counting in threes.

In this lesson, we will apply our knowledge of place value when solving a problem involving odd and even numbers.

In this lesson, we will use digit cards to make odd and even numbers and solve problems.

In this lesson, we will revisit parts of the unit: Numbers within 100 to explore partitioning 2-digit numbers and comparing and ordering numbers to 100.

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