Toan nghi ra 1 phan so sau do Toan chia tử số của phan so do cho 2 va nhan mau so cua phan so do voi 4 thi Toan thay gia tri phan so giam di 15/8.Tim phan so ma Toan nghi

tim 1 phan so biet rang hieu giua mau so va tu so cua phan so do bang 86 va biet phan so do co gia tri bang 3/5

phan so do la ; .....

tim mot phan so biet tong cua tu so va mau so cua phan so do bang 162 va biet phan so do co gia tri bang 4/5 

tim phan so do

3viet phan soco tu so  mau so la so le lon hon 6 va be hon 10 va :phan so do be hon 1:phan so do bang 1:phan so do lon hon 1

Cho phan so 3 phan 7.Neu cong them vao tu so va mau so do voi cung mot so tu nhien thi duoc mot phan so moi bang phan so 2 phan 3.Tim hai phan so do.

CAU HOI KHO QUA!NGHE NE:TIM PHAN TU CUA TAP HOP D BIET TAP HOP DO CO 1 PHAN TU VA PHAN TU DO PHAI NHO HON 1 MA PHAN TU DO PHAI KHAC 0(CAN IQ CAO DAY)

tim mot phan so biet tong cua tu va mau so cua phan so do bang 135 va biet phan so do co gia tri bang 2/3

PHAN SO DO LA...........................

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 mot phan so co mau so bang 11, biet rang khi lay tu so cua phan so do tru di 18 va mau so cua phan so do nhan voi 7 thi duoc phan so moi co gia tri bang phan so can tim.Phan so do la?

Cho phan so 3 phan 7.Neu cong them vao tu so va mau so cua phan so do voi cung mot so tu nhien thi duoc mot phan so moi bang phan so 2 phan 3.Tim hai so do.