简便计算(1+023+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)_数学解答

简便计算(1+023+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)

人气：293 ℃　时间：2020-05-11 21:54:45

解答

(1+023+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
=(1+023+0.34)*(0.23+0.34+0.65)-(0.23+0.34+0.65)*(0.23+0.34)-(0.23+0.34)
=(0.23+0.34+0.65)*【(1+023+0.34)-(0.23+0.34)】-(0.23+0.34)
=(0.23+0.34+0.65)*1--(0.23+0.34)
=0.65