The multiplier: go figure

TLF ID L90

This tutorial is suitable for use with a screen reader. It explains strategies for solving complex multiplications in your head such as 22x38. Work through sample questions and instructions explaining how to use partitioning techniques. Solve multiplications by breaking them up into parts that are easy to work with, use simple times tables, then solve the original calculation. This learning object is one in a series of five learning objects.

Educational details

Key learning objectives
• Students investigate strategies for calculating products mentally.
• Students investigate partitioning numbers to calculate products using known facts.
Educational value
• Provides explanations in support of the development of mental strategies to simplify and solve multiplication problems.
• Includes a tutorial that covers ‘tens and ones’, ‘doubling’ and ‘making tens’ strategies.
• Can be used with a screen reader.
Year level

4; 5

Learning area
• mathematics
Strand
• Mathematics/Number and algebra
Concept
• Mathematics/Multiplication
• Mathematics/Counting strategies
• Mathematics/Factors
• Mathematics/Mental arithmetic
• Mathematics/Number patterns
• Mathematics/Number relationships
• Mathematics/Distributive property
• Mathematics/Algorithms
• Mathematics/Whole numbers
Skill
• Analysis;
• Application;
• Comprehension;
• Knowledge
Student activity
• Interactives;
• Analysis;
• Experiment;
• Modelling
Learning design
• Independent learning;
• Experiential learning;
• Problem solving;
• Visual learning

Other details

Contributors
• Technical implementer
• Subject matter expert
• Publisher
• Date of contribution: 26 May 2014
• Organisation: Education Services Australia
• Address: Melbourne VIC 3000 Australia
• URL: http://www.esa.edu.au/
Access profile
• Colour independence
• Device independence
• Hearing independence
• Visual 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.