Số bé nhất co 4 chữ số là 1000
Hiệu 2 số là
1000-854=146
Số bé là
{1000-146}:2=427
Đ/S 427
Tong cua hai so la so le be nhat co 4 chu so hieu hai so la so lon nhat co3 chu so khac nhau .Tim so lon
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
Tim 2 so biet tong cua chung la so lon nhat co 4 chu so khac nhau va hieu la so be nhat co 4 chu so
tong cua hai so la 638 tim so lon biet neu xoa chu so 5 o hang tram cua so co hieu la 15 don vi vay so be la........
Tong cua hai so la 3459 neu tang so thu nhat len 36 don vi va giam so thu hai 85 don vi thi so thu nhat hon so thu hai 262 tim so lon so be
mot so co hai chu so biet tong cac chu so cua no la 8 hieu cac chu so cua cua no la 4 va chu so hang chuc lon hon hang don vi so do la so nao
trung binh cong cua 2 so la so lon nhat co hai chu so so lon hon so be 52 don vi tim 2 so do
hieu hai so tu nhien la so nho nhat co 3 chu so neu giam so lon di 35 don vi va giam di 47 don vi thi hai so do co tong la 8974 tim hai so do
tim so co hai chu so biet tong cua hai chu so do la so lon hon 10.ti so cua chu so hang chuc va chu so hang don vi la 2/3
