co phan so 203/351.tim so tu nhien a de khi ta cung cong ca tu so va mau mau so cua phan so do voi a ta duoc phan so moi co gia tri la 3/5. so a la
cho so thap phan 203/351. Tim so tu nhien a khi ta cung cong ca tu va mau so cua phan so do voi a ta duoc gia tri bang 3/5
cho phan so 46/67. tim so a de khi cung cong ca tu so va mau so cua phan so do voi a ta dc phan so moi co gia tri bang 3/4
tim 1 ps biet rang neu cong them 4 vao ts va giu nguyen ms thi ta duoc ps moi = 1 con neu giu nguyen ts va cong them 3 vao ms thi ta duoc ps moi = 1/2 ps do la
cho phan so 77/113 hoi phai cung them vao ts va ms bao nhieu don vi de ta duoc phan so moi co gia tri bang 3/4
1,Cho phan so\(\frac{3}{7}\)Cong them vao tu so va mau so cung 1 so tu nhien ta duoc phan so bang \(\frac{7}{9}\). Tim so do
2, Cho phan so \(\frac{5}{11}\). Cong ca tu va mau so voi cung 1 so tu nhien vao ta duoc phan so bang \(\frac{13}{16}\). Tim so do
Tim 1 ps so bang 3/4 va biet neu lay tu so cua phan so do cong voi 5 thi duoc ps bang ps 4/5
tim 1 so sao cho khi TS cua PS 17/24 cong vo so do va gu nguyen MS thi doc PS 5/6
khi cong them vao tu so va mau so 5/11 voi cung mot so tu nhien ta duoc mot phan so bang 113/116.tim so tu nhien do.
