Add to Twenty (Grid Games)


Add to Twenty (Grid Games) includes two board games where two numbers are added together and the answer is subtracted from 20. 


Add to Twenty (Grid Games) includes two board games from the Operation Grid Games: Addition and Subtraction series.

The two included games are Add to Twenty: Line of Four and Add to Twenty: Three lots of Three.

As they play these games, students will find the sum of two numbers (1 – 10) using strategies such as counting on from the larger number and bridging to ten. They will practise recalling the answers to these sums.

Students will also practise finding the difference between a number and twenty using bridging to ten. They will practise recalling answers to these differences.


1 printable document with 4 pages in PDF format:

  • Add to Twenty – Game Board
  • Add to Twenty: Line of Four – Instructions
  • Add to Twenty: Three lots of Three – Instructions
  • Three lots of Three – Scoresheet

Number of Players: 2 or 3 players

Additional Equipment required to play the games:

  • 2 ten-sided dice
  • 25 coloured counters for each player

The Problem Solver’s Toolkit contains all equipment required to play the games – and more!

Support Material Available:

Add to Twenty (Support) may be purchased to use alongside these games to give students a hands-on way of finding the sums and differences.

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 (Grid Games) 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 (Grid Games) 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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