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Addition and subtraction: numbers to 100 and 1,000

This guide provides a sequence of steps for exploring and developing addition and subtraction strategies, including an emphasis on not crossing 10s and 100s and crossing 10s and 100s.

Additional details
Year level(s)	Year 2, Year 3, Year 4, Year 5, Year 6
Audience	Teacher
Purpose	Teaching resource, Teaching strategies
Format	Downloadable resources
Teaching strategies and pedagogical approaches	Questioning, Concrete Representational Abstract model, Explicit teaching
Keywords	add, subtract, addition, subtraction, multiples of 100, bar model, part-whole model, reasoning, problem-solving, number tracks,, calculations, place value, place value grid, 2-digit numbers, 3-digit numbers, base 10 blocks, explicit teaching
Curriculum alignment
Curriculum connections	Numeracy
Strand and focus	Number, Build understanding
Topics	Addition and subtraction, Place value, Operating with number
AC: Mathematics (V9.0) content descriptions	AC9M2N04 Add and subtract one- and two-digit numbers, representing problems using number sentences and solve using part-part-whole reasoning and a variety of calculation strategies AC9M3A02 Extend and apply knowledge of addition and subtraction facts to 20 to develop efficient mental strategies for computation with larger numbers without a calculator AC9M4N06 Develop efficient strategies and use appropriate digital tools for solving problems involving addition and subtraction, and multiplication and division where there is no remainder
Numeracy progression	Additive strategies (P7, P8) Number and place value (P5, P7) Number patterns and algebraic thinking (P3) Multiplicative strategies (P7)
Copyright details
Organisation	White Rose Maths
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