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 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 2 chu so o phan thap phan:0,1 be hon x va be hon 0,2.
tim so thap phan x co mot chu so o phan thap phan sao cho : 8 < x > 9
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
so cac so thap phan co 3 chu so o phan thap phan ma cac so do lon hon 10 va be hon 11
tim so thap phan x ma phan thap phan co mot chu so va : 0,46*18*10<x*60<1,42*10*6
Viết tất ca cac so thap phan x co ba chu so o phan thap phan sao cho : 5,21 < x < 5 ,22
tinh tong cac so thap phan co 4 chu so khac nhau va co 3 chu so o phan thap phan duoc lap tu cac chu so 0;3;5;7.
