Taking into acount of the significant figures, what is the values of 9.99m - 0.0099 m?
9.9801 m
9.98 m
9.980 m
9.9 m
The result of an addition or subtraction in the number having different precisions should be reported to the same number of decimal places as are present in the number having the least number of decimal places.
Here 9.99 is having least number of decimal places, so
9.99-0.0099=9.9801~9.98