zadanie 43 ze strony 49 podręcznik z plusem 1 gimnazjum
na minuty:
a)0,75h
1,25h
1/12h
0,5h
0,2h
b)na sekundy:
0,25min
5/6min
1,1min
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45min
75min
5min
30min
12min
b)
15s
50s
66s