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Teach students efficient mental strategies for adding and subtracting decimals with this complete teaching bundle. Students partition decimals into place values, use compensation and doubling, check answers with the inverse relationship and choose the most efficient strategy for the numbers.

Combining a lesson plan, a 46-slide editable teacher presentation, three differentiated student activities, an exit ticket with interpretation guide and a hands-on strategy challenge game, this curriculum-aligned bundle provides everything you need to teach the lesson from start to finish.

Built around the I Do, We Do, You Do model, students move from explicit teacher modelling to guided practice and independent application. They partition ones, tenths and hundredths, make a whole number and adjust, use doubles and near doubles, solve and check with the inverse relationship, sort worked examples by strategy and find the mistake in a student's working.

What's included in this teaching bundle?

Teacher Slides (PowerPoint)

• 46 editable, ready-to-teach slides following the I Do, We Do, You Do structure
• Clear learning intention and success criteria
• Review of mental strategies with whole numbers and decimals
• Modelled examples of partitioning, compensation, doubling and the inverse relationship
• A strategy sort and a choose-your-strategy table
• A spot-the-mistake task with a worked answer
• Every question slide followed by an answer slide
• Mini whiteboard check-ins throughout

Lesson Plan and Exit Ticket (PDF)

• Complete I Do, We Do, You Do lesson plan for a 45 to 60 minute lesson
• Diagnostic, formative and summative assessment points
• Key vocabulary, teacher notes and common misconceptions
• Exit ticket (two per page) with an interpretation guide

Differentiated Student Activities (PDF)

• Activity overview to help you match each option to your students
• Three differentiated activities: Using Mental Strategies, Strategies and Checking and Choosing Efficient Strategies
• Partitioning and compensation tables with the first step started on the supported activity
• Inverse checks, doubling and near doubles, and error analysis of three worked examples
• Choose-and-justify tables, missing-number problems and multi-step reasoning
• Answer key and marking guide for every activity

Class Recording Sheet (Excel)

• Type T, A or B and the cell colours itself: Working towards, Achieving, Working beyond
• Exit ticket results and activity evidence tabs, with numbered next teaching steps

Hands-On Activity: Decimal Strategy Challenge (PDF)

• Strategy mat with four zones: basic facts and place value, partition, compensate and use the inverse
• 24 calculation cards across three levels, including missing-number cards
• Secret strategy tokens for a “3, 2, 1, reveal!” round: players commit to a strategy, solve, then defend their choice
• Recording sheet with points for each round
• Teacher page with set-up, a model round, differentiation and misconceptions
• Answer page with an efficient strategy for every card
• What you need: scissors and pencils

Ideal for upper primary classrooms, this bundle provides a structured approach to choosing efficient decimal addition and subtraction strategies, combining explicit instruction, place value models and worked examples, differentiated independent practice and an engaging hands-on reveal-and-defend partner game.

Formats: PowerPoint, PDF and Excel

Aligned to Australian Curriculum: 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 (AC9M6N04)

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