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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........
tim 2 so co tong bang 950,biet rang neu xoa di chu so 4 o hang don vi cua so lon thi duoc so be
tim so co ba chu so biet rang chu so hang don vi la 2va neu xoa di chu so 2 do thi duoc so moi gap 2 lan so co duoc khi xoa di chu so hang tram
Hieu cua hai so bang 1586 . neu ta xoa bo hang don vi cua so tru thi hieu moi se la 1638. Biet rang chu so don vi cua so tru la 5. tim hai so do
tim so co 2 chu so biet rang neu them chu so 0 xen giua chu so hang chuc va hang don vi cua so ta duoc lon gap 10 lan so da cho neu them chu so 1 vao ben trai so vua nhan duoc thi so do tang lon hon 3 lan
hieu 2 so la 5647 neu xoa chu so hang chuc va hang don vi cua so lon thi duoc so be .tim 2 so
cho hai so tu nhien co tong la 88522 tim so be biet rang neu xoa chu so 7 o hang nghin cua so lon thi duoc so be vay so be la.......
cho hai so tu nhien co tong bang 8852. tim so be biet rang neu xoa chu so 7 o hang nghin cua so lon thi duoc so be. so be la
tim hai so co hieu bang hai tram muoi sau biet rang neu them mot chu so khong vao ben phai so be thi duoc so lonhieu cua hai so bang ba tram chin muoi ba biet rang neu xoa chu so cuoi cua so lon thi duoc so behien nay bo ba mot tuoi con bon tuoi .Hoi bao nhieu nam nua tuoi bo gap bon lan tuoi con
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giai nhanh giup minh nhe minh can rat rat gap