Roundabout

A Maths Starter of The Day

Roundabout

Think of any number (perhaps your age!). Start at any letter then go around the circle performing each operation in order. Which starting point gives the largest answer? Which gives the smallest?

 

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Keywords: Starter | Arithmetic | Problem Solving | Puzzles

  • Year 11 Somerset, Gordano
  • Wednesday, January 30, 2008
  • "The largest was obviously D said Liz. She knew that F was the least straight away. Liz likes these because they are fun. Leechy was confused! "
  • 7C-M1, King Alfred's College OXON
  • Monday, January 24, 2011
  • "We found out that the difference between any two letters is the same, whatever the start number, e.g.
    Using 10 as your start number A=30 and B=40
    Using 1 as your start number A=12 and B=22
    The difference between A and B is always 10. It works with any pair.
    If you divied the number first it will have the least affect at the end number."
  • Year 9 Shapwick School, 9G
  • Wednesday, January 25, 2012
  • "We found that the difference between A and B was 10 for any starting number. Our largest total was D. We enjoyed this starter."

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This starter has scored a mean of 3.8 out of 5 based on 71 votes.

 

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Answers

Largest D

Smallest F

 

Generate a new random roundabout

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the link above to regenerate another version of this starter from random numbers.

 
Computer Teacher, do your students have access to computers?
Do you have "Laptops in Lessons"?

Whether your students each have a TabletPC or share a desktop PC, this activity lends itself to eLearning (Engaged Learning).

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Here is the URL which will take them to a concise version of this page.

Transum.org/go/?Start=January24

Here's the URL which will take
them to a related student activity.

www.transum.org/go/?to=Chain