2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写

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2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写2.006*390-20.06*41+200.6*0.2

2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写
2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写

2.006*390-20.06*41+200.6*0.2的简便运算怎嘛写
原式=20.06*39-20.06*41+20.06*2
=20.06*(39-41+2)
=20.06*0
=0