AC9M1N04 Year 1 Mathematics

This Content Descriptor from Year 1 Mathematics provides the specific knowledge and skills students should learn. Use it to plan lessons, create learning sequences, and design assessments that align with the Australian Curriculum v9.

add and subtract numbers within 20, using physical and virtual materials, part-part-whole knowledge to 10 and a variety of calculation strategies

Elaborations

• 1 using drawings, physical and virtual materials and number combinations within \(10\) to add and subtract collections to \(20\)
• 2 adding and subtracting numbers within \(20\), using a variety of representations and strategies such as counting on, counting back, partitioning and part-part-whole knowledge of numbers to \(10\); for example, using partitioning and combining \(7+5=7+3+2=10+2=12\)
• 3 developing and using strategies for one-digit addition and subtraction based on part-part-whole relationships for each of the numbers to \(10\) and subitising with physical and virtual materials; for example, \(8\) and \(6\) is the same as \(8\) and \(2\) and \(4\)
• 4 representing story problems involving addition and subtraction of numbers within \(20\) using a Think Board, recognising and using + and – symbols and the equal sign to represent the operations of addition and subtraction; showing and explaining the connections between any materials used using the language of plus and minus, and the numbers within the story problem
• 5 creating and performing addition and subtraction stories told through First Nations Australians’ dances

Related Achievement Standards