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简算：(5/12÷1/6-1/2）x1/45x（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：(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