Significant figures, decimal places, and rounding up

But the original mass was only given to two significant figures, so a more sensible answer is 0.11 (rounding the other decimal places up). 

Numbers are rounded up by looking at the next figure after the last significant number. If that is above 5, then increase the last significant number by 1. If the number is below 5, then leave the last significant number as it is. 

If you have a number such as 0.003 67, then it will not be possible to give an answer to 2 decimal places, as the final answer would be zero - not a sensible answer. Always try to look at the answer you have from a commonsense point of view and don t just write down the answer the calculator gives you. In any exam requiring calculation, you will invariably lose a mark by writing an answer that gives an absurd number of significant figures. .. 

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