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Pp w rzeczywistości = 1200 * 1600= 1920000cm kwad = 192 m2
192 : 18 to w zaokrągleniu 11
zad.9
V= 1,5dm * 2 dm *1,2 dm= 3,6 dm sześć
3,6 - o,6 = 3 dm sześć