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Giải
Trong 1 ngày hai người làm được là :
1 : 6 = 1/6 ( công việc )
Trong 4 ngày 2 người làm được là :
4 x 1/6 = 2/3 ( công việc )
Số công việc còn lại là :
1 - 2/3 = 1/3 ( công việc )
Trong một ngày Long làm được là :
1/3 : 5 = 1/15 ( công việc )
Long làm một mình trong số ngày sẽ xong công việc là :
1 : 1/15 = 15 ( ngày )
Trong một ngày Thành làm được là :
1/6 - 1/15 = 1/10 ( công việc )
Thành làm 1 mình trong số ngày là :
1 : 1/10 = 10 ( ngày )
Đáp số : 10 ngày
bạn ơi, cảm ơn bạn vì đã trả lời bài đó giúp mình nhưng bài giải của bạn là sai nha T~T
Trong 1 ngày 2 người làm được: 1 : 6 = 1/6 công việc.
Trong 4 ngày 2 ngày làm được: 4 *1/6 = 2/3 công việc.
Số công việc còn lại là: 1 – 2/3 = 1/3 công việc.
Trong 1 ngày Long làm được: 1/3 : 5 = 1/15 công việc.
Long làm 1 mình trong: 1 : 1/15 = 15 ngày sẽ xong công việc.
Trong 1 ngày Thành làm được: 1/6 – 1/15 = 1/10 công việc.
Thành làm 1 mình: 1 : 1/10 = 10 ngà
Mk thi rồi nhưng mk đc 90đ bài này. Mk ko giải đc vì mk ko có thời gian, thông cảm mk nhé!
Câu 1:3,2
Câu 2:74%
Câu 3:40 h/s
Câu 4:648
Câu 5:15 người
Câu 6:8h
Câu 7:Thiếu đề
Câu 8:24144000 đ(mk ko chắc vì mk chưa làm)
Câu 9:1,875(Câu này mk cũng chưa làm nên chưa chắc chắn)
Câu 10:Mk ko hiểu.
Đc ko bạn?
alolo
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