>>27
the notation is part of a mental effort of
>>15 to cling to the concept of the infinintesimal. What is implied is that you could add 0.0000....00001 (infinitely many zeroes) to .9(...)9 in order to get one. What is further implied, or desired, is that performing this particular sum is somehow distinct from adding 0 to 1, when in fact it is not.