Calculating GST - Year 5

Calculating GST – Year 5 is a complete mathematics unit that helps students understand and calculate the relationship between a pre-GST price, the GST amount and the GST-inclusive price.

The teaching sequence begins with the meaning of GST and the connection to tenths, then develops efficient methods for working forward from a pre-GST price, working backwards from an inclusive price and calculating from a known GST amount. Students apply these methods to contextual purchases, price tables, invoices, receipts, budgets and supplier comparisons.

A colour display, two race-game boards and twelve task cards provide flexible whole-class, small-group and independent practice. Six worksheet resources supply core practice, contextual applications, mixed strategies and multi-step challenges. The two-page GST Pop-up Shop assessment and five-level rubric support clear evidence of learning.

What's Included

• Editable Calculating GST presentation — 20 slides
• Editable quiz — 22 slides with 10 question-and-answer pairs
• 34-page unit plan PDF with a clear Table of Contents
• Calculating GST: Price Connections colour display
• Six worksheet resources covering essentials, calculations, inclusive prices, missing prices, problem solving, invoices and receipts
• GST Race Game Boards A and B
• Twelve colour GST task cards and recording sheet
• Two-page GST Pop-up Shop assessment
• Calculating GST rubric
• 13 matching answer pages plus quiz answer slides

Learning Focus

• Identify pre-GST, GST and GST-inclusive prices
• Interpret 10% as one tenth of a pre-GST price
• Calculate GST and inclusive prices from pre-GST values
• Find GST and pre-GST values from inclusive prices
• Find pre-GST and inclusive values from a known GST amount
• Use decimals and money notation accurately
• Solve multi-step financial problems involving invoices, receipts, budgets and comparisons
• Explain methods and verify calculations

Classroom Use

Use the presentation for explicit teaching and worked examples, then select worksheet pages for guided, independent, support or extension practice. The game boards and task cards suit maths rotations, partner work and revision. Use the quiz for formative checking and the two-page assessment with rubric for a final evidence task.

Formats and Answers

Includes PDF and editable PowerPoint files. The unit plan is 34 pages, the presentation is 20 slides and the quiz is 22 slides. Thirteen matching answer pages and quiz answer slides are included.

Digital Product and Licence

This is a digital product. No physical item will be shipped. Purchase permits use by the purchaser in one classroom or household. Files may not be redistributed, shared publicly, resold or uploaded to another platform.