Cho phan so 35 phan 49 . Tim mot so tu nhien sao cho khai mau so tru so do va tu so giu nguyen thi duoc phan so moi bang 7 phan 8
Loi giai cu the
Cho Phan so 34/25. Hay tim so tu nhien a sao cho khi ta lay tu so tru đi a va giữ nguyen mau so thi duoc Phan so moi bang 4/5
tim mot phan so bang phan so 9/10 neu tu so cua phan so tru di 15 va giu nguyen mau so thi ta duoc phan so moi bang phan so 3/4
cho phan so 35 / 39 . Hay tim mot so tu nhien sao cho khi them so do vao mau so cua phan so da cho va giu nguyen tu so thi ta duoc phan so moi bang 5/6 . tim so tu nhien do
Tim mot so sao cho khi tu so cua phan so 13/36 cong voi so do va giu nguyen mau so thi duoc phan so moi bang 5/9.
lay tu so cua phan so 49/75 tru di mot so tu nhien va giu nguyen mau so ta duoc phan so moi bang phan so 3/5 tim so tu nhien do
Cho phan so 24/45.tim mot so tu nhien sao cho khi lay mau so cong voi so do va giu nguyen tu so ta duoc phan so moi bang phan so 1/5
cho phan so 35/45 .tim mot so tu nhien sao cho khi dem tu so cong so do va giu nguyen mau so thi ta duoc phan so moi co gia tri bang 8/9 . so phai tim la
Cho phan so 5 phan 13.Tim mot so tu nhien de khi cong so do vao tu so va lay mau so tru di chinh so do ta duoc phan so moi bang phan so 4 phan 5.