(3.2+0.12)÷0.8用简便计算

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(3.2+0.12)÷0.8用简便计算
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(3.2+0.12)÷0.8用简便计算
(3.2+0.12)÷0.8用简便计算

(3.2+0.12)÷0.8用简便计算
3.2÷0.8+0.12÷0.8
=4+0.15
=4.15

3.2*0.8+0.12*0.8

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