Paul Moore added the comment:
See https://docs.python.org/3.7/tutorial/floatingpoint.html. Essentially, the
behaviour you are seeing is caused by the fact that the results calculations
you are attempting cannot be exactly represented in binary floating point, so
approximate results are shown
New submission from wassersteinchen :
Hi,
I am new to python and just installed it on my win pc.
First thing what I did were some calculations (see below).
There is a failure in th last digit at 10/3 and 100/3.
Sorry if this is a RTFM-issue...
armin
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018