Interactive Maths Links for the Australian Curriculum
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• select, use and record a variety of mental strategies to solve addition and subtraction problems, including word problems, with numbers of up to and including five digits, eg 159 + 23: 'I added 20 to 159 to get 179, then I added 3 more to get 182', or use an empty number line:
*pose simple addition and subtraction problems and apply appropriate strategies to solve them (Communicating, Problem Solving)
Number line - can set numbers,
increments, and choose addition or subtraction
Math Madness Addition, Subtraction, Multiplication Games
Subtraction Speed Grid
Word Problems with Katie
Grand Slam Maths
Word Problem Index -
large variety of Add/Sub problem types)
Quick Calculate
Add combinations from units to hundreds
Thinking Blocks + and – Word Problems
Number Stacker
• use a formal written algorithm to record addition and subtraction calculations involving two-, three-, four- and five-digit numbers, eg
Subtract to 3 Digits
Add to 5 Digits
• solve problems involving purchases and the calculation of change to the nearest five cents, with and without the use of digital technologies (ACMNA080)
Maths at the Mall (Toys & Cafe)
Change Maker
Making Change
Round to 5 Cents (word problems)
Round to Nearest 5 Cents
CONTENT
Students:
Apply place value to partition, rearrange and regroup numbers to at least tens of thousands to assist calculations and solve problems (ACMNA073)
OUTCOMES
A student:
› uses appropriate terminology to describe, and symbols to represent, mathematical ideas MA2-1WM
› selects and uses appropriate mental or written strategies, or technology, to solve problems MA2-2WM
› checks the accuracy of a statement and explains the reasoning used MA2-3WM
› uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers MA2-5NA
Addition and Subtraction 2
• solve addition and subtraction problems involving money, with and without the use of digital technologies
* use a variety of strategies to solve unfamiliar problems involving money (Communicating, Problem Solving)
Maths at the Mall (Toys & Cafe)
* reflect on their chosen method of solution for a money problem, considering whether it can be improved (Communicating, Reasoning)
• calculate change and round to the nearest five cents
Change Maker
Round to 5 Cents (word problems)
Round to Nearest 5 Cents
• use estimation to check the reasonableness of solutions to addition and subtraction problems, including those involving money
Word Problems with Katie
Grand Slam Maths
Number line - can set numbers,
increments, and choose addition or subtraction
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