Wpisz w postaci ułamka 20dag to........kg 20min to.......godzin 6dni to............tygodnia 9sztuk to.........tuzina 8h to.......doby 500m to........km
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2/10
2/6
6/7
9/12
8/24
1/2
20 dag =0,2 kg= 1/5 kg
20 min. = 20/60h= 1/3h
6dni= 6/7 tyg.
9 sztuk = 9/12tuzina= 3/4 tuzina
8h=8/24doby = 1/3 doby
500m=500/1000 km= 1/2 km