[tex]4,5 \ t = 4,5\cdot1000 \ kg = 4 \ 500 \ kg\\\\20 \ dm = 2 \ m\\\\50 \ dag = 0,5 \ kg\\\\25 \ min = 25\cdot60 \ s = 1 \ 500 \ s\\\\50 \ cm = 0,5 \ m\\\\1200 \ g = 1,2 \ kg\\\\0,1 \ km = 0,1\cdot1000 \ m = 100 \ m\\\\3 \ min \ 20 \ s = 3\cdot60 \ s + 20 \ s =180 \ s + 20 \ s = 200 \ s[/tex]