能简算的要简算.1.3分之2-7分之4+6分之5 2.2分之1+4分之1+8分之1+16分之1
人气：473 ℃ 时间：2019-09-09 18:35:02
解答
1、2/3-4/7+5/6
=2/3-4/7+1/3+1/2
=1-4/7+1/2
=3/7+1/2
=6/14+7/14
=13/14
2、1/2+1/4+1/8+1/16
=1/2+1/4+1/8+1/16+1/16-1/16
=1/2+1/4+1/8+1/8-1/16
=1/2+1/4+1/4-1/16
=1/2+1/2-1/16
=1-1/16
=15/16
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