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0.65×6.4+0.64×5.4简便计算
人气:412 ℃ 时间:2020-05-02 09:54:27
解答
0.65×6.4+0.64×5.4
=0.64×6.4+0.64×3.6+0.01×6.4+1.8×0.64
=0.64(6.4+3.6)+0.064+1.152
=6.4+1,216
=7.616
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