3.17+0.4×1.6怎样用简便方法做

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3.17+0.4×1.6怎样用简便方法做3.17+0.4×1.6怎样用简便方法做3.17+0.4×1.6怎样用简便方法做=3.01+0.16+4x0.16=3.01+0.16x(1+4)=3.01+0

3.17+0.4×1.6怎样用简便方法做
3.17+0.4×1.6怎样用简便方法做

3.17+0.4×1.6怎样用简便方法做
=3.01+0.16+4x0.16
=3.01+0.16x(1+4)
=3.01+0.16x5
=3.01+0.8
=3.81
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