5cm ile jest to decymetrów ?
1dm = 10cm
5cm = (5 : 10)dm = 5/10 dm = 1/2 dm
lub zapis dziesiętny:
5cm = 5/10dm = 0,5dm
1 dm - 10 cm
x dm - 5 cm
x dm = 5 cm* 1 dm / 10 cm
x = 0,5 dm.
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1dm = 10cm
5cm = (5 : 10)dm = 5/10 dm = 1/2 dm
lub zapis dziesiętny:
5cm = 5/10dm = 0,5dm
1 dm - 10 cm
x dm - 5 cm
x dm = 5 cm* 1 dm / 10 cm
x = 0,5 dm.