Question

If the immediate insignificant digit to be dropped is 5, then there will be two different cases, i) If the preceding digit is even , it is to be un changed and 5 is dropped. ii) If the preceding digit is odd it is to be raised by one.

Answer 1

Explanation:

The convention for rounding off is: preceding digit is raised by 1 if the insignificant digit to be dropped is more than 5, and is left unchanged if the latter is less than 5. ... If preceding digit is even, then insignificant digit is dropped, if it is odd, the preceding digit is raised by 1.