请用简便方法计算下面各题,6.48/(1.8*0.45)/250 (3.12+0.9)/(1-0.4)0.045/【(2.1-2.09)*0.1】

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请用简便方法计算下面各题,6.48/(1.8*0.45)/250 (3.12+0.9)/(1-0.4)0.045/【(2.1-2.09)*0.1】
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请用简便方法计算下面各题,6.48/(1.8*0.45)/250 (3.12+0.9)/(1-0.4)0.045/【(2.1-2.09)*0.1】
请用简便方法计算下面各题,
6.48/(1.8*0.45)/250 (3.12+0.9)/(1-0.4)
0.045/【(2.1-2.09)*0.1】

请用简便方法计算下面各题,6.48/(1.8*0.45)/250 (3.12+0.9)/(1-0.4)0.045/【(2.1-2.09)*0.1】
6.48/(1.8*0.45)/250
=6.48/0.45/(1.8*250)
=14.4/ 450
=0.32
(3.12+0.9)/(1-0.4)
=(3.12+0.9)/0.6
=3.12/0.6+0.9/0.6
=5.2+1.5
=6.7
0.045/【(2.1-2.09)*0.1】
=0.045/【0.01*0.1】
=0.045/0.001
=45