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3/4*1/5+3/4*2/5+0.75*3/5-3/4简便运算
人气:387 ℃ 时间:2020-02-05 06:38:22
解答
3/4*1/5+3/4*2/5+0.75*3/5-3/4
=3/4*(1/5+2/5+3/5-1)
=3/4*(1/5)
=3/20
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