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45+45*315-16*315的简便计算
人气:321 ℃ 时间:2020-04-21 07:58:09
解答
45+45*315-16*315的简便计算
=45×(1+315)-16×315
=45×316-16×315
=45×(316-16×7)
=45×144
=6480;
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