cac so thap phân co phan nguyen bang nhau, phan thap phan moi so co mot chu so khac 0 va khac nhau. hoi tich cua tat ca cac so do co phan thap gom bao nhieu chu so
hay viet cac so thap phan be hon 1 ma trong moi so co ba chu so khac nhau o phan thap phan , gom cac chu so 1 , 2 , 3 . xep cac so theo thu tu tu be den lon
em hay viet 9 so thap phan be hon 1 ma moi so do co 1 chu so khac 0
cho so thap phan 30,72 . so nay thay doi the nao neu 0
a / xoa bo dau phay
b/ dich dau phay sang ben phai 1 chu so
c/ dich dau phay sang ben trai 1 chu so
tu cac chu so 0,1,3,5 hay viet cac so thap phan be hon 1 ,moi so thap phan deu co ba chu so khac nhau . xep cac so do theo thu tu
tu lon den be;
tu be den lon ;
voi cac chu so 2,3,4 hay viet cac so thap phan co 3 chu so khac nhau , ma moi so co 2 chu so o phan thap phan . xep theo thu tu tu be den lon
Viet cac so thap phan be hon 1 ma phan thap phan co ba chu so khac nhau la 3 ; 5 ; 7.
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 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.
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 ?