Interactive Maths Links for the Australian Curriculum
Use estimation and rounding to check the reasonableness of answers to calculations (ACMNA099)
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round numbers appropriately when obtaining estimates to numerical
WMNet Rounding
Mathsframe Rounding
Mathnook Rounding (see S2)
PBS Kids Rounding
Quia Rounding
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use estimation to check the reasonableness of answers to addition and subtraction calculations, eg 1438 + 129 is about 1440 + 130
PBS Kids Rounding
Number Nut Addition
Create simple financial plans (ACMNA106)
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use knowledge of addition and subtraction facts to create a financial plan, such as a budget, eg organise a class celebration on a budget of $60 for all expenses
Mad Money Game
Chore Chart
* record numerical data in a simple spreadsheet (Communicating)
Editgrid Online Spreadsheet
* give reasons for selecting, prioritising and deleting items when creating a budget (Communicating, Reasoning)
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use the term 'sum' to describe the result of adding two or more numbers, eg 'The sum of 7 and 5 is 12'
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add three or more numbers with different numbers of digits, with and without the use of digital technologies, eg 42 000 + 5123 + 246
Expanded Addition
Subtraction with Partitioning
Dositey 3 Digit Addition
Drop and Drag Addition and Subtraction
SC Web Addition Game
Mad Money Game
Bricks Game (Tricky and Difficult Levels)
Bargain Hunt Adding Game
Change Game L3
Number Nut
(select Activities, then Addition or Subtraction)
Balancing Act – L3
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select and apply efficient mental, written and calculator strategies to solve addition and subtraction word problems, including problems involving money
* interpret the words 'increase' and 'decrease' in addition and subtraction word problems, eg 'If a computer costs $1599 and its price is then decreased by $250, how much do I pay?' (Communicating, Problem Solving)
Mathplayground Word Problem Database
Shop ‘Til You Drop (UK Money)
Grand Slam Maths
Thinking Blocks
IXL Word Problems
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record the strategy used to solve addition and subtraction word problems
* use empty number lines to record mental strategies (Communicating, Problem Solving)
Interactive Number Line (can go to 500)
* use selected words to describe each step of the solution process (Communicating, Problem Solving)
Mathplayground Word Problem Database
IXL Word Problems
Weigh the Wangdoodles
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check solutions to problems, including by using the inverse operation
CONTENT
Students:
Use efficient mental and written strategies and apply appropriate digital technologies to solve problems (ACMNA291)
OUTCOMES
A student:
› describes and represents mathematical situations in a variety of ways using mathematical terminology and some conventions MA3-1WM
› selects and applies appropriate problem-solving strategies, including the use of digital technologies, in undertaking investigations MA3-2WM
› gives a valid reason for supporting one possible solution over another MA3-3WM
› selects and applies appropriate strategies for addition and subtraction with counting numbers of any size MA3-5NA
Addition and Subtraction 1
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