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0.36*42+0.72*29的简便运算
人气:450 ℃ 时间:2020-03-20 03:44:37
解答
0.36*42+0.72*29
=0.72*21+0.72*29
=0.72×(21+29)
=0.72×50
=0.36×100
=36
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