Tim phan so co gia tri bang phan so -35/14, dong thoi co tong cua tu so va mau so la 75
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?
Tim phan so co mau bang 9, biet rang khi cong tu voi 10 va nhan mau voi 3 thi gia tri cua phan so khong thay doi
Tim phan so co tu bang -7,biet rang khi nhan tu voi 3 va cong mau voi 26 thi gia tri cua phan so khong thay doi
Mot phan so co mau bang 7 biet khi cong tu voi 16 nhan mau voi 5thi gia tri cua phan so khong doi .Tim phan so do
Tim phan so co mau bang 7, biet rang khi cong tu voi 16 va nhan mau voi 5 thi gia tri phan so khong thay doi
tim phan so co mau bang 9 biet rang khi lay tu tru 14 va nhan mau voi 2 thi gia tri ko thay doi
Cho phân số -5/9
a) hoi phai cong them vao mau va bot di vao tu cho cung mot so nao e duoc phan so moi co gia ri bang phanso -7/12
b) hay tim mot so nao sao cho khi cong so do vao tu hthem vao mau hai lan so do thi duoc phan so co gia tri bang 1/3
Cho phan so 9/43 . tim a khi biet cong tu va mau voi a duoc phan so co gia tri 1/3
