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数学
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3.6*4.5+4.5+0.54*45 用简便计算怎么做
人气:173 ℃ 时间:2020-04-09 07:01:21
解答
3.6*4.5+4.5+0.54*45
=3.6*4.5+0.45+0.54*4.5
=(3.6+0.45+0.54)*4.5
=4.59*4.5
= 20.655
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