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reSolve: Addition – partitioning

This sequence of two lessons explores early algebraic thinking around the concept of equivalence. Students develop equivalence understanding by partitioning numbers into two parts. They explore the commutative property and compensation as they are challenged to find all possible combinations. Each lesson is outlined in detail including curriculum links, vocabulary, materials needed, sample answers, discussion points and student resources. This sequence is part of the reSolve: Mathematics by Inquiry program.

Additional details
Year level(s)	Year 1
Audience	Teacher
Purpose	Teaching resource
Format	Downloadable resources
Teaching strategies and pedagogical approaches	Mathematics investigation
Keywords	number patterns, counting, associativity, partitioning
Curriculum alignment
Curriculum connections	Numeracy
Strand and focus	Number, Build understanding, Apply understanding
Topics	Addition and subtraction, Operating with number
AC: Mathematics (V9.0) content descriptions	AC9M1N03 Quantify sets of objects, to at least 120, by partitioning collections into equal groups using number knowledge and skip counting AC9M1N04 Add and subtract numbers within 20, using physical and virtual materials, part-part-whole knowledge to 10 and a variety of calculation strategies
Numeracy progression	Counting processes (P6) Number and place value (P3, P4) Additive strategies (P6)
Copyright details
Organisation	reSolve Maths by Inquiry
Copyright	© Australian Government Department of Education, Skills and Employment 2021. Creative Commons BY-NC-SA 4.0.