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Integer cruncher: subtraction

Learning objects Integer cruncher: subtraction

TLF ID L1101

Use counters to model the subtraction of integers, for example (-3)-(-5)=(+2). See the calculations represented in an alternate form on a number line. This learning object is one in a series of four objects.

Tags: Number operations
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Educational details

Key learning objectives
  • Students use a counter model to perform subtraction of integers.
  • Students use conventional representation of integers and mathematical notation.
Educational value
  • An animation demonstrates the use of counters to model the operation of subtraction of two integers.
  • Students use a counter model to subtract pairs of integers.
  • Results of subtraction operations are represented on a number line.
Year level

7

TopicsAddition; Directed numbers; Integers; Negative numbers; Number lines; Positive numbers
Learning area
  • mathematics
Strand
  • Mathematics/Number and algebra
    Concept
    • Mathematics/Integers
    • Mathematics/Subtraction
    • Mathematics/Whole numbers
    • Mathematics/Addition
    • Mathematics/Directed number
    • Mathematics/Number lines
    • Mathematics/Number relationships
    • Mathematics/Negative numbers
    Skill
    • Analysis;
    • Application;
    • Comprehension;
    • Knowledge
    Student activity
    • Interactives;
    • Experiment;
    • Estimation;
    • Analysis;
    • Modelling
    Learning design
    • Experiential learning;
    • Independent learning;
    • Problem solving;
    • Visual learning

    Other details

    Contributors
    • Technical implementer
    • Script writer
    • Name: Rod Rees
    • Organisation: Rees Films Pty Ltd
    • Address: Blackburn VIC Australia
    • Subject matter expert
    • Name: Howard Reeves
    • Organisation: Rees Films Pty Ltd
    • Address: Hobart TAS Australia
    • Publisher
    • Date of contribution: 20 Sep 2013
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL: http://www.esa.edu.au/
    Access profile
    • Colour independence
    • Hearing independence
    Learning resource type
    • Interactive Resource
    Browsers
    • Microsoft Internet Explorer - minimum version: 8.0 (MS-Windows) - maximum version: 9.0 (MS-Windows)
    • Firefox - minimum version: (MS-Windows)
    • Safari - minimum version: 5.1 (MacOS)
    Operating systems
    • MacOS - minimum version: 10.6
    • MS-Windows - minimum version: XP - maximum version: 7
    Rights
    • © Education Services Australia Ltd, 2013, except where indicated under Acknowledgements.