简算：11/12×4/5×5/6+1/4 (5/12÷1/6-1/2）×1/4 5×（4/15+1/12）-5/12 【1/2-（3/4-3/5）】÷7/10

=11/12X(4/5X5/6)+1/4
=11/12X4/6+1/4
=44/2+1/4
=88/4+1/4
=89/4
(5/12÷1/6-1/2）×1/4

=(5/2-1/2)X1/4
=4/2X1/4
=1/2
5×（4/15+1/12）-5/12

=5×4/15+5×1/12-5/12
=5×4/15+(5×1/12-5/12)
=5×4/15+(5/12-5/12)

=5x4/15+0
=20/15
【1/2-（3/4-3/5）】÷7/10

=(1/2-3/20)x10/7
=1/2x10/7-3/20x10/7
=5/7-3/14
=10/14-3/14
=7/14