A)Viet 5 phan so bé Hon 1,co Mau so la 7 va co tu so lon hon 0:

B)Viet 5 phan so lon hon 1 va co mau so la 5:

C)Viet 5 phan so bang phan so tam phan muoi hai :

D)Viet cac phan so khac 0 co tong cua tu so va mau so bang 7:

E)Hai phan so lon hon 1 co mau so bang 7 la :

G)Hai phan so bang 1 la:

H)Khoanh vao cac phan so bang ba muoi sau phan nam tu: Hai phan ba; sau phan muoi nam;tam phan muoi hai;muoi phan muoi nam 

Giai ho minh bai toan nay nhe !Minh dang can bai toan nay trong ngay hom nay.

1. Tim trung binh cong cua tat ca cac so tu nhien co 4 chu so khac nhau duoc viet boi bon chu so 0;3;5;7.Trung binh cong cua tat ca cac so do la?

2 .Tong cua 3 so bang 5,2. So thu nhat bang 2/3 so thu ba va so thu hai bang 50% so thu ba. Tim so thu hai?

3. Tim mot phan so co mau so bang 25 , biet rang neu cong tu so voi 34 va nhan mau so voi 3 thi duoc phan so moi bang phan so da cho. Tim phan so do?

4. Tim mot phan so biet rang neu cong them 4 vao tu so va giu nguyen mau so thi ta duoc phan so moi bang 1, con neu giu nguyen tu so va cong them 3 thi ta duoc phan so moi bang 1/2 .Tim phan so do?

5. Hay cho biet co tat ca bao nhieu so co 3 chu so ma tong co chu so cua moi so bang 4 . co tat ca bao nhieu so thoa man?