Add to Twenty (Support)


Add to Twenty (Support) gives students support as they add two numbers from 1 to 10 and then subtract the answer from 20. 


Add to Twenty (Support) has been designed to use alongside Add to Twenty: (Grid Games) so that students of all abilities find the games accessible.  

The inclusion of two different methods allows students to move from a more concrete approach when they begin playing the games, to a more abstract approach as their addition and subtraction skills develop. 


1 printable document with 7 pages in PDF format: 

  • Add to Twenty: Two Chocolate Bars – Graphic (1 page) 
  • Add to Twenty: Two Chocolate Bars – Literacy and Instructions on using the graphic (3 pages) 
  • Add to Twenty: Two Number Lines – Graphic (1 page) 
  • Add to Twenty: Two Number Lines – Instructions on using the graphic (2 pages) 

Additional Equipment required to use the graphic:  

  • Add to Twenty: Two Chocolate Bars – 10 tiles of one colour and 10 tiles of a second colour 
  • Add to Twenty: Two Number Lines – Erasable sleeve and white board marker 

The Problem Solver’s Toolkit and Erasable Pack contain all equipment required to use the support material. 

Target Group: 

  • Australian Syllabus Reference:ACMNA015, ACMNA030, ACMNA055 (Year 1–3)  
  • NSW Syllabus Reference:MA1-5NA (Stage 1)  

*Games may be used to reinforce and build on skills in older years.  

 Operation Grid Games YouTube and Free Overview:  

Add to Twenty (Support) is part of the Operation Grid Games – Addition and Subtraction collection. 

A quick reference for teachers, including a contents page, recommendations for how to best use the activities in this series and a summary of learning intentions and syllabus outcomes may be downloaded here: 

Free Download 

A video giving an overview of the range of activities available in Operation Grid Games may be viewed here: 


Disclaimer: Add to Twenty (Support) is a digital download and cannot be refunded. 

Copyright: All Downloadables are protected by copyright. A download gives the purchaser the right to make copies of materials for private or class use only.
Downloadables may not be used for resale. Distribution of Downloadables by a third-party provider is strictly prohibited.

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