hai so thap phan co hieu 9,12.neu doi dau phay cua so be sang phai mot hang roi cong voi so lon ta duoc 61.04.tim 2 so do
tong cua mot so tu nhien va mot so thap phan mot hoc sinh quen mat dau phay o so thap phan va cong nhu cong hai so tu nhien nen duoc ket qua la 689 tim so tu nhien do
hieu hai so la 19.8 khi dich dau phay cua so be sang ben phai 1 so thi bang so lon tim hai so do
Khi thuc hien mot phep cong voi mot so tu nhien va 1 so thap phan duoc 168,6 . Neu chuyen dau phay cua so thap phan sang ben phai 1 hang roi cong voi so tu nhien thi duoc 579 . Tim 2 so da cho
hai so thap phan co tong la 38,18. Neu ta doi dau phay cua so lon sang ben phai mot hang va giu nguyen so be thi tong cua hai so thap phan luc do la 269,93 . Tim hai so thap phan do
tim mot so thap phan biet rang neu chuyen dau phay cua no sang ben phai mot hang roi cong voi so phai tim ta duoc 13,53
Hieu 2 so thap phan la24,57 neu chuyen dau phay cua so be sang ben phai mot hang ta duoc so lon tim hai so do
tong hai so thap phan la 60,1 .Neu dich chuyen dau phay cua so nho sang phai mot chu so thi duoc so moi hon so lon 219,52 don vi .Tim so be
tong hai so thap phan la 32,46.dich chuyen dau phay cua so be sang ben phai 1 hang ta duoc so moi lon hon so lon la 26,28.tim hai so do
tim 3 so thap phan A,B va C co tong la 200,4921.Neu chuyen dau phay cua so A sang ben trai 2 chu so thi duoc so B, neu chuyen dau phay cua so A sang ben phai mot hang thi duoc so C.