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51.2*33.5+512*6.4+5.12 怎么简便
人气:448 ℃ 时间:2020-03-23 16:21:42
解答
51.2*33.5+512*6.4+5.12
=5.12*335+5.12*640+5.12
=5.12*(335+640+1)
=5.12*976
=4997.12
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