trung binh cong cua 3 so la 75 . Neu them cs 0 vao ben phai so thu 2 tthi duoc so thu nhat , neu gap 4l so thu 2 thi ta dc so thu 3 . Tim so thu nhat .
ai lam xong truoc , lam dung , trinh bay dung thi mik tik cho
mot lop hoc dai 8m rong 6m. Lop do co30 hoc sinh, moi hoc sinh can 3,4m3 khong khi .Hoi lop do can phai lam cao bao nhieu
tim 1 sô co 2 chu sô biêt nêu ta thêm chu sô 2 vao truoc va sau sô do ta duoc so moi gap so phai tim la 36 lân
cac ban lam cach giai cho mk nhe
2 lop 5a va5b doc phan cong cung lam chung 1 cong viet neu 1 minh lop 5b lam thi sau 4 gio se xong neu 1 minh lop 5a lam thi se xon trong 3 gio nhung khi chuan bi lxm thi nha truongchuyen 1 so ban xang lam 1 cong vec khac chi de lAI 1/2 lop 5a va 1/3 lop 5 hoi cac ban phai lam trong bao lau?
1 doi cong nhan xay dung du dinh lam xong mot cong viec trong 60 ngay,nhung vi co 8 ngoui phai chuyen di lam viec khac truoc khi bat dau cong viec,nen so nguoi con lai phai lam 72 ngay moi xong vĩc do.Hoi doi cong nhan con lai bao nhieu nguoi de lam xong cong viec do ?
1 doi cong nhan co 120 nguoi dap 1doan duong dai 4km . Ban chi huy tinh rang de hoan thanh cong viec dung ke hoach thi moi ngay moi nguoi phai lam 8 gio . Truoc khi khoi cong , thi them 30 nguoi ve phai dap them 1 km duong nua . Hoi de hoan thanh thi moi nguoi phai lam bao nhieu gio ?
mot doi cong nhan duoc giao dap 4 km duong . de hoan thanh cong viec dung ke hoach thi moi ngay phai lam viec 8 gio . truoc khi khoi cong , doi duoc dieu them 30 nguoi cung lam va duoc giao dap them 1 km duong nua . hoi de hoan thanh dung ke hoach thi moi ngay phai lam viec may gio ?
1 doi cong nhan xay dung du dinh lam xong 1 cong viec trong 60 ngay, nhung vi co 8 nguoi phai chuyen di lam viec khac truoc khi bat dau cong viec , nen so nguoi con lai phai lam 72 ngay moi xong cong viec. hoi doi cong nhan con lai bao nhieu nguoi de lam xong cong viec do, biet rang suc lao dong cua moi nguoi la nhu nhau
1 doi cong nhan co 120 nguoi dap 1 doan duong dai 4 km, Ban chi huy tinh rang de hoan thanh cong viec dung thi moi nguoi phai lam 8 gio moi ngay . Truoc khi khoi cong , thi them 30 nguoi va phai dap them 1 km duong nua . Hoi de hoan thanh dung ke hoach thi moi nguoi phai lam bao nhieu gio moi ngay ?