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    Hey.
    What is the best way to avoid mistakes?
    Such as sign errors/ ambiguous fractions.

    What general checking procedures do you follow?

    I find most of my mistakes are the results of one of the two examples, but im not sure of the best layout/method to avoid them.

    Thanks
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    (Original post by SamuelN98)
    Hey.
    What is the best way to avoid mistakes?
    Such as sign errors/ ambiguous fractions.

    What general checking procedures do you follow?

    I find most of my mistakes are the results of one of the two examples, but im not sure of the best layout/method to avoid them.

    Thanks
    Check each answer by a different method (e.g. substituting back into an equation).
    Also see if it possible to deduce anything that looks "wrong" from your answers: if so, you know that they themselves must be wrong.
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    In an exam, try and do all the tricky questions twice - or the ones where there is a lot of algebraic manipulation where a simple mistake could have been made.
    If you do it twice independently and don't get the same answer then you need to check what you've done.
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    Try and sanity check your answers, is the RHS always positive and the LHS always negative, maybe the RHS is always odd and the RHS is even, is there a discontinuity in your answer even though you can guess it should be a smooth function, etc...
 
 
 
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