Các câu hỏi tương tự
cho phan so 2/5 hoi neu them 15 vao mau so thi phai them so nao vao tu so cua phan so da cho de duoc phan so moi van bang 2/5?
cho phan so 2/5 hoi neu them 15 vao mau so thi phai them so nao vao tu so cua phan so da cho de duoc phan so moi bang 2/5
cho hai phan so 2/5 . hoi neu them 15 vao mau so thi phai them so nao vao tu so cua phan so da cho de dung phan so bang 2/5
Cho phan so 3/18 .hoi phai them vao tu so va bot o mau so cung mot so tu nhien nao de duoc phan so moi bang ps 3/4
cho phan so 3/5 .neu tu so cong them 6 thi mau sob phai cong thjem so nao de duoc phan so moi van bang 3/5
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.
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
Bai 2 :
cho phan so 15 / 7 . hoi can them vao ca tu so va mau so cua phan so nay cung mot so tu nhien nao de duoc phan so moi co gia tri 10/11
lam nhanh vao
Bai 3 : rut gon phan so sau :
1960/1008
cho phan so 18/27.Hoi de duoc 1 phan so bang phan so 1/2 thi phai tru di o tu so va mau so cua phan so da cho cung mot so tu nhien nao