Working with decimals seems quite easy, but without your trusty calculator, even simple calculations can leave you stumped!
In fact, in the introductory numeracy test that all level one pharmacy students complete, the decimal questions are always the most poorly answered. Let’s revise!
Click on the following link and complete the following diagnostic tests without the use of a calculator:
http://www.mathcentre.ac.uk/resources/tests/swf/Arithmetic/Diagnostics/1-03d.swf
The big problem with decimal calculations is that it's relatively easy for your answer to be off by a factor of ten, a hundred or a thousand. This can make an enormous difference in terms of medication dose and drug safety! You may find these calculations easier if you estimate first (see Key Maths: Getting started with a calculation).
Need more help? Check out this revision session from the BBC:
http://www.bbc.co.uk/schools/gcsebitesize/
maths/number/decimalsrev1.shtml
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