Class Clips is changing
We will be introducing the new Knowledge and Learning Beta website over the coming months. Clips for use in the classroom are now available on your phone, tablet or PC.

Alternatively, you can still browse or search by keyword or clip number on this site.

CLIP 10222

Two step word problems - commutativity

Two step word problems - commutativity

Did you know?

All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.

Key Info
  • Two step word problems - commutativity
  • Duration: 02:46
  • A two step word problem illustrating commutativity is shown. In a radio quiz a puppet character is presented with the problem of finding the difference between the totals of two addition sums - 8+3 and 3+8 - in order to win a prize. He doesn't know how to do it so he calls out loud for help. El Nombre appears and runs through solving the problem in illustrated steps. The answer is revealed to be 11 in both cases because the numbers are the same - it is only the order of the addition which has changed.
  • Subject:



    Problem Solving: Numbers and Calculations

  • Keywords: difference, commutativity, addition
Ideas for use in class
  • To illustrate commutativity in addition. To show how to do two step word problems.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

BBC navigation

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.