The usual ‘answer the questions and defuse the bomb’ story, this time involving substitution. Two worksheets, the second one being more difficult than the first.
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Having gone through this sheet. I have found a grave error in your calculation for question 5. Having worked it out to be 43 and not 28. I would like to understand how you got to 28?
alutwyche
4 years ago
I made a mistake initially (I added instead of subtracted) and corrected it on my copy but obviously not here; I apologise. Do bear in mind that I am sharing this for free (under no obligation to do so) and have actualy saved you a little time here, and considering that you have shared zero resources, your "grave error" comment seems a little harsh. If you don't like the resources then write your own.
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