2/7的分子加上2,要使分数大小不变,分母应(c*_.l+j。;d9p:u6J,V5k/x6o.U(C4E*T-[8p
分数单位是1/12的所有最简真分数按从小到大的顺序排列是9L.H4R.n3}'y)o9C-@0Q+Z.k:C8O3C's0b7_8K+`+\2q9J5u(p4H,_-k1p*R4q'Y(x+a。;d9p:u6J,V5k/x6o.U(C4E*T-[8p