Stage 2, mathematics, Year A – Unit 15

This 2-week, Year A unit develops the big idea that addition and subtraction problems can be solved using a variety of strategies.

Syllabus

Outcomes and content descriptors from Mathematics K–10 Syllabus (2022) © NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales, 2024.

In this 2-week unit, students are provided opportunities to:

• use the equals sign to mean 'the same as' to show equivalence, rather than to perform an operation
• select, represent and explain flexible strategies when solving addition and subtraction problems
• perform calculations with money, including finding change.

Syllabus focus area and content groups

Representing numbers using place value A – MAO-WM-01, MA2-RN-01

• Whole numbers: Read, represent and order numbers to thousands
• Apply place value to partition and regroup numbers up to 4 digits

Representing numbers using place value B – MAO-WM-01, MA2-RN-01

Whole numbers: Apply place value to partition, regroup and rename numbers up to 6 digits

Additive relations A – MAO-WM-01, MA2-AR-01, MA2-AR-02

• Use the principle of equality
• Recognise and explain the connection between addition and subtraction
• Select strategies flexibly to solve addition and subtraction problems of up to 3 digits
• Represent money values in multiple ways

Additive relations B – MAO-WM-01, MA2-AR-01, MAR-AR-02

• Partition, rearrange and regroup numbers to at least 1000 to solve additive problems
• Apply addition and subtraction to familiar contexts, including money and budgeting
• Complete number sentences involving additive relations to find unknown quantities

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