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.

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:

  • 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

Category:

  • Additive relations
  • Mathematics (2022)
  • Non-spatial measure
  • Represents numbers
  • Represents numbers using place value
  • Stage 2
  • Stage 3
  • Unit

Business Unit:

  • Curriculum and Reform
Return to top of page Back to top