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- Substitution code breaker – brackets, indices and fractions

Published: *29/11/2013*

KS3 KS4

2 pages

KS3 KS4

2 pages

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Kathryn BentleyI meant to say it's not the sheet at fault, its just that some students got themselves confused by the first calculation in the way I mentioned above because they they were unsure of the concept of dividing by 0 so ended up using the code instead of the given value. Just worth checking they have that concept secure.

Posted on 19th October 2020Kathryn BentleyHad a problem with this. Some of the calculations use the values for a, b,c and d given at the very top of the page but some use the values in the code instead:

11c/a uses c= 2 and a = 0 from code to get 22 (W)

ab-8 uses a = 5 and b=3 from the top values given to get 7 (H)

Posted on 19th October 2020Alison GreenPosted on 13th October 2016Jane WilliamsPosted on 22nd April 2014