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9分之5乘以25%+4分之1乘以2.28—0.25等于?
人气:280 ℃ 时间:2019-08-31 14:39:12
解答
=(5/9)×0.25+2.28×0.25-0.25
=(5/9+57/25-1)×0.25
=413/225×1/4
=413/900
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