Stage 2, mathematics, Year B – Unit 22
This unit develops the big idea that addition and subtraction problems can be solved using a variety of strategies.
Syllabus
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.
Students are provided with opportunities to:
- apply place value understanding to solve addition and subtraction problems
- identify the connection between addition and subtraction
- select and explain efficient flexible strategies when solving problems.
Representing numbers using place value A – MAO-WM-01, MA2-RN-01
Whole numbers: Read, represent and order numbers to thousands
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
- Whole numbers: Recognise and represent numbers that are 10, 100 or 1000 times as large
Additive relations A – MAO-WM-01, MA2-AR-01
- 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
Additive relations B – MAO-WM-01, MA2-AR-01, MA2-AR-02
Partition, rearrange and regroup numbers to at least 1000 to solve additive problems