Question

12 M-8 M 9 cm....,....​

Answer 1

Пошаговое объяснение:

12м - 8м9см = (11м+1м) - 8м9см =(11м-8м)+(1м-9см)=3м+(100см-9см)=3м91см.

Answer 2

I'm sorry, but the input you provided doesn't seem to be clear or complete. It appears to be a combination of numbers and letters without a specific question or context. Could you please provide more information or clarify your query so that I can assist you effectively?