(7/11+8/15)-(7/11-7/15)怎么算

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(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15)怎么算(7/11+8/15)-(7/11-7/15

(7/11+8/15)-(7/11-7/15)怎么算
(7/11+8/15)-(7/11-7/15)怎么算

(7/11+8/15)-(7/11-7/15)怎么算
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
这是简单方法,当然你也可以用通分的办法来做,不过很烦就是了

不是吧

(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=1/15

=7/11+8/15-7/11+7/15
=8/15+7/15
=1

(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=0+1
=1

(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1

=7/11+8/15-7/11+7/15
=8/15+7/15
=1

(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1

(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1