6.6*(0.68+0.42)简便计算

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6.6*(0.68+0.42)简便计算
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6.6*(0.68+0.42)简便计算
6.6*(0.68+0.42)简便计算

6.6*(0.68+0.42)简便计算
6.6*(0.68+0.42)
=6.6*1.1
=6.6*(1+0.1)
=6.6*1+6.6*0.1
=6.6+0.66
=7.26

6.6*(0.68+0.42)
=6.6*(0.6+0.08+0.4+0.02)
=6.6*(1+0.1)
=6.6+0.66
=7.26