### The commutative Law of Addition using aggregation

In this lesson, we will learn about the commutative law of addition using aggregation. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

Skip navigation# Unit Overview: Addition and Subtraction

## Lessons:

### The commutative Law of Addition using aggregation

### The commutative Law of Addition using augmentation

### Measures Contexts to Show the Commutative Law of Addition

### Embedding Understanding of Equivalent Expressions

### Ten can be partitioned into pairs of numbers that sum to ten

### Reasoning with number bonds

### Numbers that Sum to 10

### Adding one

### Subtracting one

### Consecutive numbers

### Adding two

### Subtracting two

### Adding and subtracting with 5 and 3 and with 6 and 3

### Adding or subtracting Zero

### Subtracting a number from itself

15 lessons

In this lesson, we will learn about the commutative law of addition using aggregation. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn about the commutative law of addition using augmentation. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will look at the commutative law of addition in measuring contexts. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will embed our understanding of equivalent expressions. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn about how ten can be partitioned into pairs of numbers that sum to ten. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will reason about expressions using number bonds to 10. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will use knowledge of pairs of numbers that sum to 10. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that adding one gives one more. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that subtracting one gives one less. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that consecutive numbers have a difference of one. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will add two to odd numbers and to even numbers. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will subtract two from odd numbers and from even numbers. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that addition and subtraction facts for the pairs 5 and 3, and 6 and 3, can be related to known facts and strategies. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that, when adding or subtracting zero to a number, the number remains unchanged. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

In this lesson, we will learn that subtracting a number from itself gives a difference of zero. Resources provided by NCETM (CC BY-NC-SA: https://creativecommons.org/licenses/by-nc-sa/4.0)

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