8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?

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8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?8.9×0.045+0.89×0.42+0.089×1.3怎

8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?
8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?

8.9×0.045+0.89×0.42+0.089×1.3怎样算简便?
我会

原式=8.9×(0.045+0.042+0.013)
=8.9×0.1
=0.89

收起

把8.9,0.89,0.089都化成一个数

89x0、45+89x42+89x0.0013

(8.9×10)×(0.045÷10)+(0.89×100)×(0.42÷100)+(0.089×1000)×(1.3×1000)

8.9*(0.045+0.42%10+1.3%100)