
5.4*[(1.3十2.15)÷0.5]怎样简便计算
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5.4*[(1.3十2.15)÷0.5]
=5.4*[3.45÷0.5]
=5.4*6.9
=5.4*7-5.4*0.1
=37.8-0.54
=37.26
=5.4*[3.45÷0.5]
=5.4*6.9
=5.4*7-5.4*0.1
=37.8-0.54
=37.26
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