怎么简便5.5x9.9x5.5
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发布时间:2024-09-25 21:27
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热心网友
时间:2024-10-31 04:39
5.5×9.9×5.5
=5.5×﹙10-0.1﹚×5.5
=﹙5.5×10-5.5×0.1﹚×5.5
=﹙55-0.55﹚×5.5
=54.45×﹙5+0.5﹚
=54.45×5+54.45×0.5
=272.25+27.225
=299.475
热心网友
时间:2024-10-31 04:36
9.5-(1-0.9)=9.5X0.1=0.95