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数学
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9分之8乘〔0.75减(16分之7减0.25)〕=
人气:299 ℃ 时间:2020-04-04 22:01:59
解答
9分之8乘〔0.75减(16分之7减0.25)〕=16/18*(12/16-(7/16-4/16))=16/18*9/16=9/18=1/2 -----------------------------------------注意:0.75 0.25 都可以转化成分母是16的分数,注意到了这一点,接下来的思路就有了...
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