21.28-21.28/7.6*3.1应该怎样简算简算题

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21.28-21.28/7.6*3.1应该怎样简算简算题21.28-21.28/7.6*3.1应该怎样简算简算题21.28-21.28/7.6*3.1应该怎样简算简算题21.28-21.28/7.6*

21.28-21.28/7.6*3.1应该怎样简算简算题
21.28-21.28/7.6*3.1应该怎样简算
简算题

21.28-21.28/7.6*3.1应该怎样简算简算题
21.28-21.28/7.6*3.1=21.28(1-3.1/7.6)=(21.28/76)*(76-31)=0.28*45=13.6