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 ?

khi cong mot so tu nhien voi mot so thap phan , do so xuat mot hang nen ket qua tim duoc la 87,8 . tim mot so thap phan do biet ket qua dung la 51,98. tim so thap phan do ( viet so thap phan duoi dang so thap phan toi gian nhe cac ban nhe  ).

                                               mong cac ban giai ho cho minh , minh se tick cho nguoi do O

tim so thap phan x co mot chu so o phan thap phan sao cho : 8 < x > 9

tim so thap phan lon hon 6 va be hon 7 biet rang so do co hai cho so khac o phan thap phan va tong cac chu so o phan thap phan bang chu so o phan nguyen

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

Viết tất ca cac so thap phan x co ba chu so o phan thap phan sao cho :       5,21 < x < 5 ,22

cho 4 chu so 0;2;4;8.tu cac chu so tren, hay viet so thap phan be nhat co mot chu so o phan thap phan moi chu so da cho xuat hien trong cach viet dung mpot lan .vay so thap phan be nhat can tim la..............

Tim hieu cua so thap phan lon nhat co cac chu so le khac nhau va so thap phan nho nhat co cac chu so chan khac nhau

tim x sao cho 3 < x <4

a/ x la so tu nhien

b/ x la so thap phan co 1 chu so o phan thap phan