how to change the spreadsheets from lift to right?

Even though I think you meant "left" to "right" I still do not understand the question. What would you like to change from left to right?

In Numbers a file contains a document on the hard drive

a document contains sheets

a sheet contains tables, media, text, and graphical objects

a table contains cells

a cell contains numbers, text, dates, times, duraitons

If you mean you are working in a right-to-left language and want, for example, the Header Column to be on the right, then unfortunately you cannot do that in Numbers (or in Excel for the Mac). You can do it in some versions of Excel running under Windows and perhaps in some open source spreadsheet programs.

If you mean the sheets listed in "tabs" across the top, you can drag those into whatever order you want.

SG