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简便运算:1/3*4.5/(0.75+5/4)
人气:363 ℃ 时间:2020-02-05 20:45:50
解答
1/3*4.5/(0.75+5/4)
=1/3*4.5/(3/4+5/4)
=1/3*4.5/2
=1/3*3*1.5/2
=1.5/2
=(3/2)/2
=3/2*1/2
=3/4
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