怎样简便就怎样计算.1/7+5.4+6/79+1/4-（1/4+5/6）5/6+4/5-11/151/6+3/4-8/92+3/7+7/9-（2+3/7-1/9)==========4/5-(0.625-1/5)2/19+2/19+2/19+2/19+2/19+2/191/27+2/27+3/27+……+26/27======

Question

怎样简便就怎样计算.
1/7+5.4+6/7 9+1/4-（1/4+5/6） 5/6+4/5-11/15 1/6+3/4-8/9 2+3/7+7/9-（2+3/7-1/9)
= = = = =
= = = = =
4/5-(0.625-1/5) 2/19+2/19+2/19+2/19+2/19+2/19 1/27+2/27+3/27+……+26/27
= = =
= = =

Answer 1

1/7+5.4+6/7
=1/7+6/7+5.4
=1+5.4
=6.4
9+1/4-（1/4+5/6）
=9+（1/4-1/4）-5/6
=9-5/6
=8又1/6
5/6+4/5-11/15
=5/6+（4/5-11/15）
=5/6+1/15
=9/10
1/6+3/4-8/9
=11/12-8/9
=1/36
2+3/7+7/9-（2+3/7-1/9)
=（2-2）+（3/7-3/7）+（7/9+1/9）
=0+0+8/9
=8/9
4/5-(0.625-1/5)
=4/5+1/5-0.625
=1-0.625
=0.375
2/19+2/19+2/19+2/19+2/19+2/19
=2/19×6
=12/19
1/27+2/27+3/27+……+26/27
=（1/27+26/27）×26÷2
=1×26÷2
=13