1.Cho so N la so co hai chu so chia het cho 3.Neu viet xen so 0 vao giua hai chu so do roi cong no voi hai lan chu so hang chuc cua so N ta duoc so moi gap 9 lan so N.Tim so do

2.Tong hai so thap phan la 60,1.Neu dich dau phay cua so nho sang ben phai mot hang roi dem tru di so lon thi ta duoc 219,52.Tim hai so do.

3.Tim so co hai chu so biet neu ta them so 33 vao giua hai chu so do thi duoc mot so moi gap so phai tim 89 lan.

khi cong hai so thap phan, mot ban hoc sinh viet nham dau phay cua so hang thu nhat sang ben phai mot hang nen duoc ket qua la 30.25. tim hai so do , biet tong dung la 19.09

cho mot so thap phan,doi dau phay cua so thap phan do sang ben phai mot chu so ta duoc so thap phan thu 2.Lay so thu hai tru di so ban dau ta duoc hieu bang 362,043.Tim tong cua so thap phan ban dau va so thap phan thu hai?

cho mot so thap phan,doi dau phay cua so thap phan do sang ben phai mot chu so ta duoc so thap phan thu 2.Lay so thu hai tru di so ban dau ta duoc hieu bang 294 , 58.Tim tong cua so thap phan ban dau va so thap phan thu hai?

khi thuc hien phep cong cac so thap phan mot ban da viet nham dau phay cua mot so hang sang ben phai 1 hang do do duoc ket qua la 692,22.Ban hay tim 2 so do biet rang tong dung bang 100,56

tong cua hai so thap phan la 108,64.Do viet nham dau phay cua mot so hangsang ben phai mot hang nen khi cong ket qua tim duoc la 190,36. Tim hai so ban dau

khi thuc hien phep cong hai so thap phan, mot ban hs da viet nham dau phay cua mot so hang sang ben phai mot hang do do ket qua la 52,58.hay tim hai so do biet tong la 19,13

khi cong mot so tu nhien voi mot so thap phan mot ban hoc sinh viet nham dau phay lui sang phai mot hang nen ket qua tim duoc la 87,87. tìm so thap phan do biet tong cua chung la 51,98

cho mot so thap  phan  ,doi dau phay cua so thap phan do sang ben phai  mot chu so ta duoc so thap phan thu hai cong hai so thap phan lai ta duoc294,58 .Hoi so thap phan ban dau la bao nhieu?