第1个回答 2012-06-01
1. 3.8+3.91÷(22-19.7)
=3.8+3.91÷2.3
=3.8+1.7
=5.5
68÷[0.5x(7.5-0.7)]
=68÷[0.5x6.8]
=68÷0.5÷6.8
=68÷6.8÷0.5
=20
352-162÷36x24
=352-4.5x24
=352-108
=244
[六分之五-(十四分之五-七分之二)]x十八分之七
[5/6-(5/14-2/7)]x7/18
=(5/6-1/14)x7/18
=16/21x7/18
=8/27
(三分之一+六分之一+九分之一)÷三十六分之一
=(1/3+1/6+1/9)÷1/36
=(6/18+3/18+2/18)x36
=11/18x36
=22
八分之一x[二分之一÷(五分之三x九分之十)]
=1/8x[1/2÷(3/5x10/9)]
=1/8x[1/2÷2/3]
=1/8x1/2x3/2
=3/32
第2个回答 2019-09-23
1,原式=(7/6)(8/7)(9/8)........(119/118)(120/119)
=120/6
=20
2,原式=(1-3/10)÷(33/50)=35/33
3,原式=[5.5-1.04×(5/3+6/3)]÷2.9
=[5.5-1.04×2.5]÷2.9
=[5.5-0.52×5]÷2.9
=5×(1.1-0.52)÷2.9
=1
4,计算量很大是不是题目有错?
第3个回答 2016-03-02
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第4个回答 2013-01-04
切!我才不呢!!没赏钱、、没经验、、真是的!!
这种问题你还是问精英吧!!