Co tat ca bao nhieu phan so khac 5/6 co gia tri bang 5/6 ma mau so be hon 50

Có tất cả ...phan so

co bao nhieu phan so co gia tri bang phan so 27 phan 45 ma ca tu so va mau so deu co 2 chu sô

Co bao nhieu phan so  co gia tri bang 3/4 co mau so nho hon 50

co bao nhieu phan so = 5/11 biet bot o mau so 22 don vi thi duoc phan co co gia tri bang 17/33

giup mk giai toan mk tic dung cho nha

a) cho 2 phan so 11,32 va 29,83 . Hoi phai bot o so be dong thoi them vao so lon  mot gia tri la bao nhieu de duoc 2 so co ti so la 1/4 .

b) tim phan so a/b co gia tri bang 2/7 , biet rang neu bot 3 don vi o mau so  thi duoc mau so moi co gia tri bang 3/10

hay cho biet co tat ca bao nhieu phan so co gia tri bang phan so 3/5 ma tu so va mau so deu la so co ba chu so

cho phan so 51/109 . hoi phai chuyen tu mau so len tu so bao nhieu don vi thi ta duoc phan so moi co gia tri bang 3/4 ? ( nho co cach giai )

cho phan so 39/73 hoi phai them vao ca tu va mau bao nhieu don vi de duoc phan so co gia tri bang phan so 3/5