In a multi-step calculation, it's generally best to avoid rounding until the final result to maintain accuracy. If rounding is necessary at intermediate steps, limit it to one or two decimal places, depending on the precision required for the final answer. Ultimately, the goal is to keep as much precision as possible throughout the calculation to minimize rounding errors.
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Yes. You always round at the end of a calculation. If you begin rounding in the middle, your answer will be incorrect, because every number matters. You also want to take significant figures into account, unless you're given how many places to round to.
Done the calculation (get the answer) and also show the remainder (don't round up or down).
Rounding up when the last digit is over 5 can artifically inflate the resulting number, particularly if you round at every intermediate calculation. In general, students are advised to maintain all digits throughout the calculation and to only round the final result.
The circumference of a 4 inch round circle is: about 12.57 inches. You can easily do this calculation for other circles by multiplying the diameter by Pi (about 3.1416).
There are two main situations.when one (or more components) in a calculation is given in rounded form, it will limit the accuracy of the answer. For example, if you use pi = 3.1416 then the calculated area should not have more than 5 significant digits.if the answer to an exact calculation is a long decimal string - particularly an irrational number.