Comparison by rounding

The first option will require combining two assertions we have previously analyzed: absolute error and a concrete number of decimals. If we want to check that the student's answer exactly has n decimal places, and these are identical to the correct answer first n decimal places after rounding, we need to set the error margin to 0.5·10-n and define the precision to n decimal places.  
 
For instance, if the correct answer is   
19.586

Student Answer
Decimal places	19.6	19.59	19.58	19.587	19.586
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Using a grading function

The second option will require some programming in CalcMe through a grading function. If we want to check that the first n decimal places of the student and correct answers are identical after rounding, we need to define the following user-defined routine (for n=2).  

Tip

You can see more about grading functions here.