If you are using the calculator Casio fx-570MS, chances are that if you type in 6÷2(1+2) you will get the answer 1. It's wrong. The answer's 9. You will get it right if you are using Casio fx-50FH or some of the newer versions. Not to worry if you are using the older versions, cause it ain't coming out in the exams. Apparently, however, once you've done the numbers in the bracket, you'll have to follow the sequence first, meaning divide before multiplication.
Also, if you are a Physics student, be warned to reset all your modes on our calculator before the exam, or when you use 'sin', 'cos' and 'tan' you are likely to get a wrong answer... phew, I only discovered this just before the exam when my friend's calculator kept getting the answers in negative and other people's calculator got the correct answers........
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