I have quite significantly enlarged the guides for the calculation topics for the AQA, OCR and Edexcel. It is mostly more worked examples of different sorts of possible calculations.
These are the updated files
AQA 1.2 revision guide calculations
OCR 2.1.4 acids
Edexcel 5. formulae equations and amount
If you are looking for questions to do you will find them on the text book page
chemrevise 