Broken Calculator

A Maths Starter of The Day

 

 

 

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Keywords: Starter | Arithmetic | Calculator | Place Value | Problem Solving

"A set of real life savers!!
Keep it up and thank you!"

*Malcolm P, Dorset
Thursday, September 28, 2006

 

"Prompted a great deal of enthusiasm and competition to find the quickest way!"

Pete Freer, Rotherham
Tuesday, September 18, 2007

 

"We did it in 35 moves beat that!"

Joe Murray, Linwood High
Tuesday, September 18, 2007

 

"We got 34. "

Kenny Dyson, Deans Community HS, Livingston
Wednesday, September 19, 2007

 

"I found an answer for 30 moves"

Russ Skinner, Grant Park High School, Winnipeg, MB, Canada
Saturday, September 22, 2007

 

"27th Sept We did it in 26 goes. Beat that"

George Abbot, Guildford Surrey
Thursday, September 27, 2007

 

"I completed this exercise in 28 moves taken screen shot I can email it to you!! :):)"

Jamie Pascoe, Notton House School
Thursday, September 27, 2007

 

"My clever class did it in 24 buttons!
Beat that!"

BIS Jakarta, Indonesia
Friday, September 28, 2007

 

"Can you please provide how you did it in 26 steps ive been trying forever and cant do it in less than 32"

Mr. B., Essex, UK
Friday, September 28, 2007

 

"As a class we have managed to complete this in 24 moves!
Can anyone beat that?"

Year 8 Set 2 Brinsworth Comp, Rotherham
Friday, September 28, 2007

 

"Thanks everyone for their feedback. Perhaps we should set some rules here.
When you first load this starter the target numbers are 16, 24, 97 and 624. If you refresh the page or click the "Change Numbers" button you will get four random target numbers. Let's agree that we are looking for the least number of button presses which achieves the original four target numbers.
Rather than just the number of button presses you should also record the buttons pressed E.g. 15+1+5+… etc"

Transum,
Friday, September 28, 2007

 

" Here is the solution for 24 moves from my Y8 class, a team effort.

11 + 5 = CE 11 + 1 + + + + 1 515 + 11 + 1 =
(16) (24) (97) (624)"

Peter Freer, Brinsworth Comp Rotherham
Friday, September 28, 2007

 

"We have also managed to do it in 24 moves. Start with getting the 24 and get the 16 last by using the clear button"

George Abbot School, Guildford Surrey
Friday, September 28, 2007

 

"Alex Robb's mum class 8b did it in 22 moves feeling quite smug."

Kerry robb, Brinsworth Rotherham
Monday, October 01, 2007

 

"This was a really good starter, I did it with my top set year 7 and they loved it, especially when they realised there were shorter ways than what they had done, it made them determined to find it."

Mr Barnes, Bradford
Saturday, November 17, 2007

 

"I'm not great at Maths but I did it in 63."

Tom, LGS
Wednesday, March 05, 2008

 

"Word - my year 10 bottom set (and proud) got a 27 first go. 'ave sum. "

Mr Bracewell, Hanham High, UK
Friday, March 14, 2008

 

"We are from Park Academy we did it in 24"

Mrs Lowry, SPA
Thursday, September 18, 2008

 

"We had a go at this in class and no one could figure out how to do it in 24 moves... but i tried it at home and got it!!! 24 moves!! YAY!!!"

Amber Read, 11 yrs,
Thursday, September 25, 2008

 

"Bishop Ramsey Year 11 did this in 21 goes. Well done Chris!!!!"

L Holmes, Ruislip
Tuesday, September 30, 2008

 

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world. Click here to enter your comments.

If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:
 
Excellent, I would like to see more like this
Good, achieved the results I required
Satisfactory
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 4.5 out of 5 based on 74 votes.
 

  

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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 button above to regenerate another version of this starter from random numbers.


Teacher, do your students have one to one access to computers?

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

Here's the shorter URL which will take
them to this page.

http://www.transum.org/go/?to=calc15