VC2M3A02
extend and apply knowledge of addition and subtraction facts to 20 to develop efficient mental strategies for computation with larger numbers without a calculator
- partitioning using materials and part-part-whole diagrams to develop subtraction facts related to addition facts, such as 8 + 7 = 15 therefore 15 − 7 = 8 and 15 − 8 = 7
- using partitioning to develop and record facts systematically (for example, ‘How many ways can 12 monkeys be spread among 2 trees?’, 12 = 12 + 0, 12 = 11 + 1, 12 = 10 + 2, 12 = 9 + 3, …), explaining how they know they have found all possible partitions
- understanding basic addition and related subtraction facts and using extensions to these facts; for example, 6 + 6 = 12, 16 + 6 = 22, 6 + 7 = 13, 16 + 7 = 23, and 60 + 60 = 120, 600 + 600 = 1200
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Daily Maths Problems - Year 3
A 63 slide editable PowerPoint Template for problem solving in mathematics.
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Subtraction Sausage Dog – Worksheet
A set of superb subtraction sausage dog worksheets.
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Number Talks - Three-Digit Addition Task Cards
Build number sense skills with this set of 24 task cards.
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Ten Add Bowling Active Learning
A whole class active game that encourages learning through a physical setting.
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Equation Tails Active Learning
A whole class active game that encourages learning through a physical setting.
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Dodging Equations Active Learning
A whole class active game that encourages learning through a physical setting.
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Maths Activity Ideas for Parents - Addition and Subtraction
An information sheet for parents or carers to use when assisting children with addition and subtraction at home.
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Friends of... 1 to 10 - BW
A set of 10 posters showing how different combinations of numbers connect to make the same number.
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Number Matching Puzzle - Multiplication
A hands-on game to play when learning about multiplying numbers.
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Jump Strategy Subtraction Game
Learn how to use the jump strategy to solve subtraction problems with a fun subtraction game.
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Number Talks Teaching Resource Pack - Grade 3
A collection of number talks teaching resources that support meaningful and highly engaging conversations in the mathematics classroom.
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Addition and Subtraction Strategies PowerPoints – Teaching Resource Pack
A collection of Teaching Presentations that explore strategies for the computation of addition and subtraction.
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Maths Resource Packs for Parents - Addition and Subtraction
An extensive collection of resources for for parents to help Year 3 and Year 4 children with addition and subtraction.
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Maths Worksheet Maker
Easily create and diffentiate maths worksheets with a combination of addition, subtraction, multiplication and division facts.
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Exploring Subtraction Strategies Unit Plan
This Mathematics unit covers a range of mental computation strategies for subtraction.
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Addition Detectives
This Mathematics unit covers a range of mental computation strategies for addition.
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Jump Strategy
A 60-minute lesson designed to explore the jump strategy for adding two- and three-digit numbers.
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Trade It!
A 60-minute lesson in which students learn how to trade when subtracting.
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Jump or Split
A 60-minute lesson in which students will learn the jump and skip strategies to subtract.
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Think 'Addition' to Subtract
A 60-minute lesson in which students apply their knowledge of addition and subtraction as inverse operations to solve equations with missing addends.
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Frolic with Fact Families
A 60-minute lesson in which students explore the relationship between the members of fact families.
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Aim for a Zero-Tail
A 60-minute lesson in which students learn the strategy of making ten to subtract.
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What Do You Know?
A 60-minute lesson in which students will revise strategies such as counting on, counting back, subtracting 10, and using known number facts.
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Finding Your Strategy
A 60-minute lesson designed to reinforce that students can choose to use different addition strategies in different situations.
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Assessment - Addition Strategies
A 30-minute assessment designed to assess students' understanding of working with place value to solve problems, the connection between addition and subtraction, and the development of efficient mental strategies for computation.
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Compensation Strategy
A 60-minute lesson designed to build upon students' understanding of addition and subtraction by exploring compensation.
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Split Strategy
A 60-minute lesson designed to progress students' understanding of mental addition by partitioning numbers into place value to help them find a total.
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Number Boards
A 60-minute lesson designed to explore the use of number boards/hundreds charts when adding numbers.
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Bridging to Ten
A 60-minute lesson designed for students to recall 'friends of ten' facts and use this knowledge to solve addition sums.
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Concrete Materials
A 60-minute lesson to reinforce students' understanding of basic addition principles, using concrete materials.
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Exploring Subtraction Strategies – Assessment
An assessment task in which students will demonstrate their knowledge and understanding of subtraction strategies.