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AC9M1N04

Number > Addition & Subtraction

Australian Curriculum Version 9 Says:

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

What this means

Learn to add and subtract numbers to 20. This would include 17 + 3 = 20.
Link the addition and subtraction using part-part-whole thinking.
Extend this to 15 + 4 = 19, 4 + 15 = 19, 19 – 15 = 4, 19 – 4 = 15
Calculation strategies: e.g. Counting on from the larger number by
1, 2 or 3 & Partitioning to Bridge Ten (e.g 7 + 5 = 7 + 3 + 2 that is, 10 + 2)

(see images in descriptor card)

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Resources & Manipulatives

These Quick Curriculum Guides have been designed to take a look at the Australian Mathematics Curriculum (AC9), explain terminology and provide interpretations.

Narelle and I have used our professional judgement to put forward what is appropriate for students at this year level.

Authors: Dr Paul Swan & Narelle Rice
We would like to also thank Linda Marshall and David Dunstan for comments and assistance.

These documents serve as general advice only and do not take into account your specific needs and conditions. While best care has been taken in compiling these materials, mistakes may exist.
Australian Curriculum version 9 materials used under Creative Commons licence from ACARA. Readers should always refer back to the curriculum itself and the state-based curriculum that is relevant for you.

This document is copyright of A-Z Type (Dr Paul Swan). A copy of this document may be downloaded from www.drpaulswan.com.au.