5.76*1.1+57.7*0.89如题...多少?简便计算~
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5.76*1.1+57.7*0.89如题...多少?简便计算~
5.76*1.1+57.7*0.89
如题...多少?简便计算~
5.76*1.1+57.7*0.89如题...多少?简便计算~
5.76*1.1+57.7*0.89
=(5.77-0.01)*1.1+5.77*8.9
=5.77*(1.1+8.9)-0.01*1.1
=57.7-0.011
=57.689
原式=(5.77-0.01)*1.1+5.77*8.9=5.77*(1.1+8.9)-0.01*1.1=57.7-0.011=57.689