1)8км16м =...м ;2)5м 9мм=...мм ;3)2т 3ц 6кг =...кг ; 4) 4ц 7кг 8г = ...г ; 4) 2сут 9 ч 25 мин =....мин ; 5) 3ч 12мин 46с =...с ; 6) 870мин =...ч ...мин
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