分数简算(计算).
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分数简算(计算).
![](http://img.wesiedu.com/upload/f/1c/f1c30174c39ba9ec9cdad74bdd0424c9.jpg)
![](http://img.wesiedu.com/upload/f/1c/f1c30174c39ba9ec9cdad74bdd0424c9.jpg)
![分数简算(计算).](/uploads/image/z/17806109-5-9.jpg?t=%E5%88%86%E6%95%B0%E7%AE%80%E7%AE%97%EF%BC%88%E8%AE%A1%E7%AE%97%EF%BC%89.)
10、
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+2/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128
=1/2+1/4+1/8+1/16+1/32+1/64+1/64
=1/2+1/4+1/8+1/16+1/32+1/32
=1/2+1/4+1/8+1/16+1/16
=1/2+1/4+1/8+1/8
=1/2+1/4+1/4
=1/2+1/2
=1
11、=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/256-1/256
==1/2+1/4+1/8+1/16+1/32+1/64+1/128+2/256-1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128-1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/64-1/256
=1/2+1/4+1/8+1/16+1/32+1/32-1/256
=1/2+1/4+1/8+1/16+1/16-1/256
=1/2+1/4+1/8+1/8-1/256
=1/2+1/4+1/4-1/256
=1/2+1/2-1/256
=1-1/256
=255/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+2/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128
=1/2+1/4+1/8+1/16+1/32+1/64+1/64
=1/2+1/4+1/8+1/16+1/32+1/32
=1/2+1/4+1/8+1/16+1/16
=1/2+1/4+1/8+1/8
=1/2+1/4+1/4
=1/2+1/2
=1
11、=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/256-1/256
==1/2+1/4+1/8+1/16+1/32+1/64+1/128+2/256-1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/128-1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/64-1/256
=1/2+1/4+1/8+1/16+1/32+1/32-1/256
=1/2+1/4+1/8+1/16+1/16-1/256
=1/2+1/4+1/8+1/8-1/256
=1/2+1/4+1/4-1/256
=1/2+1/2-1/256
=1-1/256
=255/256