6/11+11/30*10 6/13*3/8*4/9 简便计算
问题描述：
6/11+11/30*10 6/13*3/8*4/9 简便计算
答
6/11+11/30*10
=6/11+11/3
=18/33+121/33
=139/33
6/13*3/8*4/9
=6/13x(3/8x4/9)
=6/13x1/6
=1/13