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B1 MỘt cái thùng không nắp có dạng hình hộp chữ nhật có chiều dài 8dm chiều rộng 6dm chiều cao 5dm .Tính diện tích sắt phải dùng làm thùng B2 đặt tính rồi tính A) 37,67:2,1=........ 48,98:37=......... B) 25,68*43=.......... 110,01*2,96=........ Mn gúp mình đi mình đang cần gấp mn có 25 phút dể làm
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