To round up or to round down?

[the.watchman]

would it be appropriate to keep it in exact form? i was told that we didn't have to worry about rouding in methods as we must keep everything in exact form.

Speaking of which, do we need to rationalise surds in our answers? my teacher says no... (sorry off-topic)

I definitely would, because you shouldn't really have a surd on the denominator
However, it is best to do what your teacher says until the exam...

[|ll|lll|]

yeah, that was what i was thinking. we were taught that in year 9/10 maths. but when our teacher does her working on the board, she doesn't rationalise the denominator (ie when labelling intercepts).
it's annoying when methods is just all about graphs! ;/

[Yitzi_K]

This Q about rounding came up in our methods class today, my teacher said it's ok to round up or down as long as you explain (eg 'to the nearest rabbit' or 'discounting partial rabbits') but if you leave it as a fraction you'll lose the mark.

[crayolé]

This Q about rounding came up in our methods class today, my teacher said it's ok to round up or down as long as you explain (eg 'to the nearest rabbit' or 'discounting partial rabbits') but if you leave it as a fraction you'll lose the mark.

Clearest answer yet, thanks ;]

[darkphoenix]

Yeah i think my teacher said that to round down because you don't technically have 79 proper rabbits.

But so far in textbooks and stuff, most have rounded up, so im confused..

Probably both could be justified.