so tu nhien a la 19 nhan dung minh nha minh lam dung day
a=199999999999999999999999999999999999999999999
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 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
cho phan so 168/180.tim mot so tu nhien sao cho khi ta cung bot o tu so va mau so cua phan so da cho voi so tu nhien do ta duoc mot phan so moi bang 3/5.
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.
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
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?
cho phan so 20/59. hay tim so tu nhien a sao cho khi them a vao ca tu so vao mau so cua phan so da cho ta duoc phan so moi co gia tri bang 2/5
cong them vao mau so dong thoi bot di o tu so cua phan so 91/59 voi cung mot so tu nhien ta duoc phan so bang 3/2.tim so tu nhien do.
cho phan so 5/11 .Hay tim mot so nao do de khi cong cung so do vao tu so va mau so cua phan so da cho thi duoc mot phan so co gia tri bang 2/3
