Cac phan so ; 5 / 15,100 / 300,9 / 33,111 / 333 phan so nao bang phan so 24 / 72

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 cac phan so theo thu tu tu cac phan sô 6/10 ,44/66,30/55 sao cho mau cua phan so thu nhat bang tu cua phan so thu hai ,mau phan so thu hai bang tu cua phan so thu ba

tim cac phan so co tu so be hon 30 va: bang phan so 5/3 va bang phan so 4/7 dang cAN GAP

cho phan so 31/32. Hay tim tong tat ca cac phan so bang phan số 31/32 ma co tu so cua moi phan so bang 1

tim cac phan so bang nhautrong cac phan so day :2:5 ; 4:7; 6:15; 8:14; 16:28; 24:60;

tim 1 phan 2 ; 1 phan 3 ; 1 phan 5 ; 1 phan 6 ; 1 phan 10 ; 1 phan 12 cua 60

tim 15% ; 20%; 50%; 75% cua 60

tim cac so ma 60 chia het cho so 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

viet cac phan so lan luot bang 13 phan 36 va 17 phan 24 co mau so chung la 72