Additive relations B
Mathematics K–10 (2022) · Stage 2 · View this focus area on the NESA NSW Curriculum website ↗
Outcomes
MA2-AR-01 selects and uses mental and written strategies for addition and subtraction involving 2- and 3-digit numbersMA2-AR-02 completes number sentences involving addition and subtraction by finding missing valuesContent dot points
Each dot point has its own page with resources matched to it.
Partition, rearrange and regroup numbers to at least 1000 to solve additive problems
- Use quantity values and non-standard partitioning to solve addition and subtraction problems
- Model addition with and without regrouping and record the method used
- Model subtraction with and without regrouping and record the method used
- Use an algorithm with understanding to record addition and subtraction calculations, where efficient, involving 3-digit numbers
- Recognise how hundreds are exchanged in subtraction algorithms requiring regrouping
- Recognise when mental strategies would be more efficient than a vertical algorithm for subtraction (Reasons about relations)
- Solve subtraction questions with missing digits given the difference (Reasons about relations)
Apply addition and subtraction to familiar contexts, including money and budgeting
- Use estimation to check the validity of solutions to addition and subtraction problems, including those involving money
- Reflect on a chosen strategy for solving a problem, considering whether it can be improved
- Interpret problems involving money as requiring either addition or subtraction
Complete number sentences involving additive relations to find unknown quantities
- Calculate missing numbers by completing number sentences involving addition and subtraction (Algebraic reasoning)
- Find the missing number in an equivalent number sentence involving operations of addition or subtraction on both sides of the equals sign (Algebraic reasoning)
- Create word problems that correspond to given addition and subtraction number sentences
Focus area resources
- Unit/PlanningAnnotated work samples – Stage 2, activity 1: additive relations
- Unit/PlanningAnnotated work samples – Stage 2, activity 2: additive relations
- Unit/PlanningTeaching advice – Stage 2: additive relations B language and vocabulary
Stage 2 planning resources
Stage- or course-wide documents (scope and sequences, guides) that cover this focus area alongside others.
- Unit/PlanningMaking connections – Stage 2 (parallel content)
- Unit/PlanningSample scope and sequence – Stage 2