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An Nguyễn Xuân
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0
2024-05-07 20:00:42
13/60
2024-05-06 20:37:27
tính 1/2 lượng nước :lấy (4*5):1/4=1/2=80l
số lít nước ban đầu là: lấy 80*2=160l
(*) tức là nhân