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9又3/4-15*19-2/19简便算法
人气:143 ℃ 时间:2020-06-15 13:42:06
解答
这个能简便吗?
9又3/4-15*19-2/19
=9+3/4-15*(20-1)-2/19
=9-300+15+57/76-8/19
=-276+49/19
=-276+2+11/19
=-273又8/19
祝你开心
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