0.85x0.85x0.4怎么简便计算?
2016-04-26
展开全部
0.85x0.85x0.4
=0.85x0.2x0.2x0.85
=0.017x0.017
=0.017+0.07x0.017
=0.017+0.00119
=0.01819
=0.85x0.2x0.2x0.85
=0.017x0.017
=0.017+0.07x0.017
=0.017+0.00119
=0.01819
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