274 ,MUỒN GIẢI RÕ THÌ TÍCH MÌNH TRƯỚC
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tong cua 2 so la 432 . so lon nhat co 5 chu so ma chu so hang cao nhat la 1. neu xoa bo chu so 1 do thi duoc so be . tim 2 so do
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cau 1 ;2 so co tong la 346 biet so be la so co hai chu so va khi viet them chu so 3 vao truoc so be thi duoc so lon tim so be
cau 2 ; tong 2 so la 390 so be l¸o co 2 chu so va neu viet them chu so 3 vao truoc so be thi duoc so lon tim so lon
cau3;chu vi 1 khu dat hinh chu nhat =68 chieu dai hon chieu rong16m nguoi ta trong rau tren khu dat do TB cu 2m vuong trong duoc 2 kg rau tinh so rau o khu dat do
cau4 ; TBCcua 2 so la so nho nhat co 3chu so khac nhau biet so lon lon hon TBCcua 2so la 24 don vi tim so be va so lon
tong cua hai so la 858 so lon co tan cung la chu so 0 neu xoa chu so 0 o so lon thi duoc so be. Tim hai số đó
1) Cho 2 so khac nhau . So lon co chu so hang chuc la 7 , chu so hang don vi la 3 . Neu xoa chu so 7 va chu so 3 do ta duoc so be . Hieu cua 2 so do la 9082 . Tim 2 so do ?
2)So sanh A va B :
A = 2008/987654321 + 2009 / 246813579 . Day la phan so
B = 2009/987654321 + 2008 / 246813579 . Day la phan so