lấy [75+15]:2=45
lấy 45-39=6
trả lời 6
nhớ cho mik
trinh quang tèo lớp 43 làm đúng 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999%
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15 ở đâu zậy TRịnh quang tèo lớp 43
cách giải nè:giả sử thời gian nghỉ là 1 giờ thì ta có:(cách 1)(75 - 50 - 1) : 4=6
( cách 2) (50:2-1):4=6
(cách 3) 75 - 1=74
50:2=25
74:2=37
37-25=12
12 : 2=6
tk cho mk, mk tk lại
trịnh quang tèo lớp 43 cho mình hỏi 45 ở đâu mà ra vậy bạn ?
theo đề bài ta có: 1/2+75km = 3/4 quãng đường.Vậy 75km=3/4-1/2=1/4 quãng đường.75km=1/4 quãng đường vậy quãng đường đó dài 300km.1 giờ đi đc 50km vậy 300km đi hết : 300/50=6h.