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0.87×2.3+8.7×77简便运算
怎么简便运算那?
人气:171 ℃ 时间:2020-04-06 14:18:55
解答
0.87×2.3+8.7×77
=0.87×2.3+0.87×770
=0.87×(2.3+770)
=0.87×772.3
=671.901
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