MA15NA
Uses a range of strategies and informal recording methods for addition and subtraction involving one and twodigit numbers
Outcomes

Addition and Subtraction 1

Represent and solve simple addition and subtraction problems using a range of strategies, including counting on, partitioning and rearranging parts (ACMNA015)

Use concrete materials to model addition and subtraction problems involving one and twodigit numbers
Examples

Use concrete materials and a number line to model and determine the difference between two numbers
Examples

Create, record and recognise combinations of two numbers that add to numbers up to and including 9
Examples

Create, record and recognise combinations of two numbers that add to numbers from 11 up to and including 20
Examples

Investigate and generalise the effect of adding zero to a number, eg 'Adding zero to a number does not change the number'
Examples

Relate addition and subtraction facts for numbers to at least 20, eg 5 + 3 = 8, so 8  3 = 5 and 8  5 = 3
Examples

Use and record a range of mental strategies to solve addition and subtraction problems involving one and twodigit numbers, including:counting on from the larger number to find the total of two numbers, counting back from a number to find the number rema
Play Activities 317Examples

Use the equals sign to record equivalent number sentences involving addition, and to mean 'is the same as', rather than as an indication to perform an operation, eg 5 + 2 = 3 + 4
Examples

Use concrete materials to model addition and subtraction problems involving one and twodigit numbers

Represent and solve simple addition and subtraction problems using a range of strategies, including counting on, partitioning and rearranging parts (ACMNA015)
 Addition and Subtraction 2