11/12×4/5×5/6+1/4
=(11*4*5)/(12*5*6)+1/4
=11/18+1/4
=44/72+18/72
=62/72
=31/36
再问： 简算：(5/12÷1/6-1/2）x1/4 5x（4/15+1/12）-5/12 【1/2-（3/4-3/5）】÷7/10 麻烦您再说一下这几道题怎么算
再答： ：(5/12÷1/6-1/2）x1/4=(5/12*6-1/2）x1/4=(5/2-1/2）x1/4=2x1/4=1/2 5x（4/15+1/12）-5/12= 5x4/15+5/12-5/12=4/3 【1/2-（3/4-3/5）】÷7/10=【1/2-（3/4-3/5）】*10/7 =1/2*10/7-3/4*10/7+3/5*10/7 =5/7-15/14+6/7 =11/7-15/14 =22/14-15/14 =7/14 =1/2
