Multi-age 3–6, mathematics, Year B – Unit 15
This multi-age unit develops the big idea that addition and subtraction problems can be solved using a variety of strategies.
In this 2-week unit, students are provided opportunities to:
- partition, rearrange and regroup numbers to at least 1000 to solve additive problems (Stage 2)
- choose and use efficient strategies to solve addition and subtraction problems, including decimals and percentages (Stage 3)
- select and apply known strategies to flexibly add and subtract large numbers and decimals, including in rich real-world tasks.
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
- Whole numbers: 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
- Whole numbers: Recognise and represent numbers that are 10, 100 or 1000 times as large
Additive relations A – MAO-WM-01, MA2-AR-01, MAR-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, MA2-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
Represents numbers A – MAO-WM-01, MA3-RN-02
Decimals and percentages: Recognise that the place value system can be extended beyond hundredths
Representing numbers using place value B – MAO-WM-01, MA2-RN-03
- Decimals and percentages: Make connections between benchmark fractions, decimals and percentages
- Decimals and percentages: Determine percentage discounts of 10%, 25% and 50%
Additive relations A – MAO-WM-01, MA3-AR-01
- Apply efficient mental and written strategies to solve addition and subtraction problems
- Use estimation and place value understanding to determine the reasonableness of solutions
Additive relations B – MAO-WM-01, MA3-AR-01
- Choose and use efficient strategies to solve addition and subtraction problems
- Applies known strategies to add and subtract decimals
Non-spatial measure B – MAO-WM-01, MA3-NSM-02
Time: Solve problems involving duration, using 12- and 24-hour time
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.