What is an instance when you might want to find an estimate for fraction sums or differences rather than an exact answer

Instances that require estimated answers instead of exact answers are those in which a high level of accuracy is not required. This may be due to the value being calculated being very large. In order to estimate the value, we simply round the value after a certain number of digits after the decimal point.

Step-by-step explanation:

The Instances that you might want to find an estimate for fraction sums or differences rather than an exact answer are those in which a higher level of accuracy is not required. This may be caused by the value being calculated being very large and when to estimating the value, we round the value after a certain number of digits after the decimal point.

the second one

Step-by-step explanation: