AC9M6N04
Number > Decimal Addition and Subtraction
Australian Curriculum Version 9 Says:
Apply knowledge of place value to add and subtract decimals, using digital tools where appropriate; use estimation and rounding to check the reasonableness of answers.
What this means
Adding and subtracting decimals to 3 decimal places (thousandths).
- If doing a written calculation, it is important to line up the decimal places, e.g., adding 3.51 and 12.07
- The number of decimal places does not need to be the same.
Tip
- Try grid paper as an aid to help line up decimal calculations.
Interactives & Downloadables
Resources & Manipulatives
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Teaching Place Value Year 5+
$22.00 – $129.00 inc. GST -
Calculators in Classrooms
$22.00 – $129.00 inc. GST
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.