The difference bar: generate easy subtractions

TLF ID L111

Learn how to split up numbers in your head. Use a linear partitioning tool to help find the difference between pairs of two-digit numbers such as 25 and 34. In these examples, the difference is always less than ten. Split the numbers into parts that are easy to work with, work out each part and then solve the original calculation.




Educational details

Educational value
  • Encourages students to solve subtractions using mental strategies.
  • Provides a series of whole number pairs which students are challenged to find the difference between.
  • Provides hints for mental strategies that aid student subtraction skills.
  • Provides an option to print a worksheet for each completed equation showing the student’s working out.
Year level

3

Learning area
  • Mathematics

Other details

Contributors
  • Contributor
  • Name: CWA New Media
  • Organization: CWA New Media
  • Description: Subject matter expert
  • Address: NEW ZEALAND
  • URL: http://www.cwa.co.nz/
  • Name: Maths Technologies Ltd
  • Organization: Maths Technologies Ltd
  • Description: Technical implementer
  • Address: NEW ZEALAND
  • URL: http://www.nzmaths.co.nz/
  • Name: Education Services Australia
  • Organization: Education Services Australia
  • Description: Data manager
  • Copyright Holder
  • Name: Education Services Australia
  • Organization: Education Services Australia
  • Address: AUSTRALIA
  • URL: www.esa.edu.au
  • Publisher
  • Name: Education Services Australia Ltd
  • Organization: Education Services Australia Ltd
  • Description: Publisher
  • Address: VIC, AUSTRALIA
  • URL: www.esa.edu.au
  • Resource metadata contributed by
  • Name: Education Services Australia Ltd
  • Organisation: Education Services Australia Ltd
  • Address: AUSTRALIA
  • URL: www.esa.edu.au
Access profile
  • Colour independence
  • Device independence
  • Hearing independence
Learning Resource Type
  • Interactive
Rights
  • © Education Services Australia Ltd, 2016, except where indicated under Acknowledgements. This material may be used in accordance with the Creative Commons Attribution-ShareAlike 3.0 Australia (CC BY-SA 3.0 AU) licence https://creativecommons.org/licenses/by-sa/3.0/au/.