Помогите плиз 7 сут. 6 ч - 5 сут. 8 ч =..............
35 квадратных.м 70 кв.см - 90 кв.дм=............
4 ц 86 кг * 13 = ..............
15 кв.км - 20 га = ................
14 км 490 м / 18=.....................
2 ч 5 мин - 55 мин =.............
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