来自钱桂禧的问题
【六年级上册人教版数学第二单元分数简便算法练习题见下9/4x2/21-5/4x6/516/15x21/20x5/1(6/5-12/5)x362/1x3/2x4/3x5/4x6/5====(6/5+12/5)x4812x4/3x12/516x(4/3-8/3)11/8x6/7x4/11====急】
六年级上册人教版数学第二单元分数简便算法练习题见下
9/4x2/21-5/4x6/516/15x21/20x5/1(6/5-12/5)x362/1x3/2x4/3x5/4x6/5
====
(6/5+12/5)x4812x4/3x12/516x(4/3-8/3)11/8x6/7x4/11
====
急
