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CLIP 10222

Two step word problems - commutativity

Two step word problems - commutativity
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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:

    Maths

       Topic:

    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

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