# Integer cruncher: addition and subtraction

TLF ID L585

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

#### Educational details

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

7

Learning area
• mathematics
Strand
• Mathematics/Number and algebra
Concept
• Mathematics/Directed number
• Mathematics/Integers
• Mathematics/Number lines
• Mathematics/Number relationships
• Mathematics/Negative integers
• Mathematics/Negative numbers
• Mathematics/Subtraction
• Mathematics/Whole 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
• Subject matter expert
• Name: Howard Reeves
• Organisation: Rees Films Pty Ltd
• 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.

Includes: