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~](/uploads/image/z/2810301-69-1.jpg?t=5.76%2A1.1%2B57.7%2A0.89%E5%A6%82%E9%A2%98...%E5%A4%9A%E5%B0%91%3F%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%7E)
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