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AC9M1N04: Year 1 Mathematics Content Descriptor – Number
AC9M1N04 Year 1 Mathematics

AC9M1N04 – Year 1 Mathematics: null

Strand
Number
Substrand
Number

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.

Content Descriptor

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

Elaborations

  • • using drawings, physical and virtual materials and number combinations within \(10\) to add and subtract collections to \(20\)
  • • 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 \(7+5=7+3+2=10+2=12\)
  • • 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 \(4\)
  • • 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
  • • creating and performing addition and subtraction stories told through First Nations Australians’ dances

Achievement Standard This Supports

This Content Descriptor contributes to the following Achievement Standard:

Year 1 ASMATY1
Year 1 Mathematics Achievement Standard
By the end of Year 1, students connect number names, numerals and quantities, and order numbers to at least 120. They demonstrate how one- and two-digit numbers can be partitioned in different ways and that two-digit numbers can be partitioned into tens and ones. Students partition collections into equal groups and skip count in twos, fives or tens to quantify collections to at least 120. They solve problems involving addition and subtraction of numbers to 20 and use mathematical modelling to solve practical problems involving addition, subtraction, equal sharing and grouping, using calculation strategies. Students use numbers, symbols and objects to create skip counting and repeating patterns, identifying the repeating unit.They compare and order objects and events based on the attributes of length, mass, capacity and duration, communicating reasoning. Students measure the length of shapes and objects using uniform informal units. They make, compare and classify shapes and objects using obvious features. Students give and follow directions to move people and objects within a space. They collect and record categorical data, create one-to-one displays, and compare and discuss the data using frequencies.