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thanhtrabt
2 năm trước
bài 1: Ô tô đi quãng đường dài 240 km từ lúc 6 giờ 30 phút với vận tốc 80km/giờ thì đến nơi lúc mấy giờ. bài 2 : A. 6,8 x 102. ; B. 31,25 : 2,5 GIÚP MK VỚI MK ĐANG CẦN GẤP
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