Is there some light version of Libre Office with Writer and Calc only?
I use Libre Office on my home PC (windows 10). Installed version took 681 Mb.
I dont need Impress, Draw, Math, Base.
Is there some light version of Libre Office with Writer and Calc only?
No, there is not.
But you can download one of the “Portable Versions” and use it e.g. on a memory stick.
LibreOffice 7.2.4.1 installed - 681 Mb
LibreOffice 7.2.4 Portable MultilingualStandard unpacked - 729 Mb
Packed portable version took 268 Mb. Will unpack when needed.