[tex]a)\\\\20\ cm = \cfrac{1}{5}\ m \\\\75\ cm = \cfrac{3}{4}\ m \\\\b) \\\\250\ m = \cfrac{1}{4}\ km \\\\800\ m = \cfrac{4}{5}\ km \\\\c) \\\\35\ dag =\cfrac{7}{20}\ kg \\\\600\ g = \cfrac{3}{5}\ kg \\\\d) \\\\650\ kg = \cfrac{13}{20}\ t \\\\40\ kg = \cfrac{1}{25}\ t \\\\[/tex]
Pamiętajmy, że:
[tex]1\ cm = 0,01\ m = \cfrac{1}{100}\ m \\\\1\ m = 0,001\ km = \cfrac{1}{1000}\ km \\\\1\ dag = 0,01\ kg = \cfrac{1}{100}\ kg \\\\1\ g = 0,001\ kg = \cfrac{1}{1000}\ kg \\\\1\ kg = 0,001\ t =\cfrac{1}{1000}\ t \\\\[/tex]
więc:
[tex]a)\\\\20\ cm = 20 \cdot \cfrac{1}{100} \ m = \cfrac{20}{100}\ m = \cfrac{1}{5}\ m \\\\75\ cm = 75 \cdot \cfrac{1}{100} \ m= \cfrac{75}{100}\ m = \cfrac{3}{4}\ m \\\\b) \\\\250\ m = 250 \cdot \cfrac{1}{1000} \ km = \cfrac{250}{1000}\ km = \cfrac{1}{4}\ km \\\\800\ m = 800 \cdot \cfrac{1}{1000} \ km =\cfrac{800}{1000}\ km = \cfrac{4}{5}\ km \\\\[/tex]
[tex]c) \\\\35\ dag = 35 \cdot \cfrac{1}{100} \ kg = \cfrac{35}{100}\ kg = \cfrac{7}{20}\ kg \\\\600\ g = 600 \cdot \cfrac{1}{1000} \ kg = \cfrac{600}{1000}\ kg = \cfrac{3}{5}\ kg \\\\[/tex]
[tex]d) \\\\650\ kg = 650 \cdot \cfrac{1}{1000} \ kg = \cfrac{650}{1000}\ kg = \cfrac{13}{20}\ t \\\\40\ kg = 40 \cdot \cfrac{1}{1000} \ kg = \cfrac{40}{1000}\ kg = \cfrac{1}{25}\ t \\\\[/tex]
#SPJ2
