co hai so thap phan [moi so co ba chu so o phan nguyen ,mot chu so o phan thap phan]­ ma hieu la 326,2vi ngu gat nen sai 3 loi trong bai toan tru thanh cong bo dau phay cua phan thap phan va tang so hang tram o tren len 1 don vi nen co ket qua la 9192 tim hai so do

Cac chu so phan muoi, phan tram, phan nghin cua mot so thap phan co 3 chu so o phan thap phan la 3 so le lien tiep . Tong cac chu so o phan thap phan bang phan nguyen cua so do, cac chu so o phan nguyen va phan thap phan deu khac nhau . Tim    so thap phan do ?

tim tong cua 2 so thap phan biet so thap phan thu nhat co phan nguyen la so lon nhat co mot chu so va phan thap phan la so lon nhat co 2 chu so khac nhau , so thu 2 hon so thu nhat 17,3.

tim so thap phan x co mot chu so o phan thap phan sao cho  : 9<x<10

trong mot phep tru co so bi tru la so tu nhien,so tru la so thap phan ma phan thap phan co mot chu so,mot ban hoc sinh viet thieu dau phay nen tien hanh tru nhu hai so tu nhien va ket qua tim duoc la 164.tim so tru va so bi tru biet hieu dung la 328,7

tu cac chu so 0,1,3,6 lap tat ca cac so thap phan ma phan thap phan co mot , hai hay ba chu so va o moi so co du bon chu so tren moi chu so suat hien mot lan

hay viet 9 so thap phan be hon 1 ma phan thap phan cua moi so do co mot chu so va khac 0

tim mot so thap phan ma o phan nguyen la so chan be nhat co 3chu so khac nhau , phan thap phan la so le lon nhat co 2 chu so khac nhau

trong mot phep tru co so bi tru la so tu nhien , so tru la so thap phan ma phan thap phan co 1 chu so,mot ban hoc sinh da viet thieu dau phay len tien hanh tru nhu tru hai so tu nhien va ket qua tim duoc la 164.tim so tu nhien va biet hieu dung cua chung la 328,7