tim hai so tu nhien co tong la 254 biet neu viet them mot chu so 0 vao ben phai so thu hai va giu nguyen so thu nhat thi duoc tong moi la 716

Tim 2 so tu nhien co tong 254.Neu viet them chu so 0 va ben phai so thu nhat va giu nguyen so thu2 thi dc tong moi la 362

hieu cua 2 so tu nhien la 134 neu viet them mot chu so vao ben phai so bi tru va giu nguyen so tru thi hieu moi la 2297.Tim chu so viet them va 2 so do

tim 2 so co tong 373. Neu viet tthem chu so 4 vao ben phai so thu nhat va giu nguyen so thu 2 thi tong moi la 890.

tim mot so tu nhien co hai chu so biet neu viet them mot chu so 0 vao ben phai va mot chu so 1 vao ben trai so do thi ta duoc so moi bang 50 la so phai tim

tim phan so co dong thoi cac tinh chat sau

a/Tu cua phan so la so tu nhien co mot chu so

b/Hieu giua tu so va mau so la 4

c/Neu giu nguyen tu so va viet them vao ben phai mau so mot chu so dung bang tu so,thi duoc phan so moi bang phan so 1/5

tim 1 so tu nhien biet rang neu viet them mot

 chu so 0 vao ben phai so can tim thi duoc so moi va tong so moi va so can tim la 6105

tim hai so co tong la 77 . neu them vao ben phai so thu nhat mot chu so 3thi duoc tong moi la 359

tim mot so tu nhien biet rang neu them chu so 0 vao tan cung ben phai so do thi duoc so moi ma tong cua so moi va so phai tim la 143