Mathematics / Year 1 / Number

Curriculum content descriptions

add and subtract numbers within 20, using physical and virtual materials, part-part-whole knowledge to 10 and a variety of calculation strategies (AC9M1N04)

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
General capabilities
  • Numeracy Numeracy
ScOT terms

Subtraction,  Modelling (Mathematical),  Number operations,  Addition

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Work sample Year 1 Mathematics: Donuts

This work sample demonstrates evidence of student learning in relation to aspects of the achievement standards for Year 1 Mathematics. The primary purpose for the work sample is to demonstrate the standard, so the focus is on what is evident in the sample not how it was created. The sample is an authentic representation ...

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Duck in a Bucket - Calculate

In this game for pairs or teams, students practise addition and subtraction of small numbers, using multiple strategies.

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Make 10 - Calculate

This game challenges students to choose pairs of cards that sum to ten. The game develops students' skills of addition and subtraction, creating simple equations and using mathematical language to describe their thinking processes.

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Put them together

Students rearrange the parts of an addition situation to show commutativity. They use appropriate thinking strategies to solve simple addition problems and record addition problems with numerals and symbols.

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Recording data in a game of Kolap: Part 1

In this first of two lessons, students investigate and play a First Nations Australian children’s instructive game of throwing skill called Kolap. They collect and represent data, and discuss their findings.

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Addition and subtraction: Year 1 – planning tool

This planning resource for Year 1 is for the topic of Addition and subtraction. Students build upon the foundations of additive thinking. They draw upon part-part-whole understanding of numbers to 10 as they explore addition and subtraction within 20.

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Work sample Year 1 Mathematics: Equilateral triangles

This work sample demonstrates evidence of student learning in relation to aspects of the achievement standards for Year 1 Mathematics. The primary purpose for the work sample is to demonstrate the standard, so the focus is on what is evident in the sample not how it was created. The sample is an authentic representation ...

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Addition & Subtraction Year 1 - Calculate

This activity uses Cuisenaire rods to help demonstrate if students 'trust the count'.

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Visualising data for a game of Kolap: Part 2

In this second of two lessons, students create a visual representation of the data collected and recorded while playing a First Nations Australian children’s instructive game of throwing skill called Kolap.

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Odd & Even Year 1 & 2 - Calculate

In this lesson students investigate odd and even numbers.

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Counting games - years 1 and 2

This is a teacher resource that includes a set of student activities including counting games, focusing on numbers to 100, accompanied by copy masters and a detailed teacher guide for each activity. The games include the Korean number counting game sam yew gew - referred to as 'sam-yuk-gu' in the Australian Curriculum. ...

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Show me your money - years 1 and 2

This is a teacher resource consisting of a set of student activities designed to encourage learning about the appearance and value of money, accompanied by copy masters and a detailed teacher guide for each activity. The activities make use of Australian coins and notes, and also Japanese and Singaporean coins, and include ...

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Literacy and numeracy improvement: a whole-school approach

This teacher resource describes how 74 public schools in metropolitan, regional and rural Western Australia used three major components of the school improvement cycle to achieve significant improvement in the literacy and numeracy learning outcomes of their students. The resource is organised in nine sections: Summary, ...

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Mathematical modelling: Year 1 – planning tool

This planning resource for Year 1 is for the topic of Mathematical modelling. Students use mathematical modelling to solve practical problems involving additive situations including simple money transactions.

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First steps in mathematics: Number – Book 2

The content of this book is organised into topics including understanding operations, calculating, and reasoning about number patterns.

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100 Face (Cuisenaire Rods) - Calculate

This engaging game encourages students to arrange the Cuisenaire rods to create a face that equals 100.

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Pass The Count - Calculate

This game allows students to practice their skip counting skills in small groups.

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Place value: Year 1 – planning tool

This planning resource for Year 1 is for the topic of Place value. Students further establish part-part-whole when exploring one- and two-digit numbers. They use partitioning to think about and represent numbers in different ways.

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Number: Foundation to Year 9

This comprehensive resource describes the progression of number-related ideas showing the relationship to other curriculum strands. The resource demonstrates examples of relevant teaching strategies, investigations, activity plans and connected concepts in number including teaching and cultural implications.

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Operations: Foundation to Year 9

This comprehensive resource describes the progression of ideas that cover addition and subtraction of integers; multiplication and division of integers; the four operations with common and decimal fractions; and operation applications with percent, rate and ratio.