The tenth floor is "le dixième étage" in French.
If you say any number, then no matter how close it is to one-tenth, I can always say another number that's even closer. There's no such thing as the number that's closest to one-tenth, either before it or after it.
One hundredth.
Yes. The prefix 'deci-' carries the meaning 'tenth' from its origins in the French 'déci-', and further back in the original, classical Latin 'decimus', for tenth. It chiefly is used in the metric system. But it may be used to specify the tenth part of any specified unit of measure.
10.3
It's equal to neither. The prefix 'deci-' comes from the ancient, classical Latin language and into the English language by way of the French. The original Latin term is 'decimus', which means 'tenth'. The meaning in French is 'one-tenth', particularly in reference to the metric system of standard measures and weights that the French Revolutionaries set up. Likewise, the English meaning is 'one-tenth' of a unit of measure. Therefore, 'deci-' isn't equal to either 10 or 1,000. It's equal to 1/10th of whatever is being measured.
To say the tenth of June in French, you would say "le dix juin."
dixième
You say "quatrième étage" in French to indicate the fourth floor.
Le troisième étage is third floor in French.
"Sweep the floor" in French is "balayer le sol."
joyeux dixième anniversaire
premier étage
Dernier etage.
plans d'étage
D'appui au sol.
le plancher
le vingt-neuvième étage