(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)

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摘要解：(1+0.23+0.34)×（0.23+0.34+0.65）-（1+0.23+0.65）×（0.23+0.34）=（1+0.57)×(0.65+0.57)-0.57-0.23×0.57-0.65×0.57=1×(0.65+0.57)+0.57×(0.65+0.57)-0.57-0.23×0.57-0.65×0.57=0.65+0.57+0.57×0.65+0.57×0.57-0.57-0.23×0.57-0.65×0.57=0.65+0.57×0.57-0.23×0.57=0.65+(0.57-0.23)×0.57=0.65+0.34×0.57

咨询记录 · 回答于2022-10-03

(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)× (0.23+0.34) 简便运算

解：(1+0.23+0.34)×（0.23+0.34+0.65）-（1+0.23+0.65）×（0.23+0.34）=（1+0.57)×(0.65+0.57)-0.57-0.23×0.57-0.65×0.57=1×(0.65+0.57)+0.57×(0.65+0.57)-0.57-0.23×0.57-0.65×0.57=0.65+0.57+0.57×0.65+0.57×0.57-0.57-0.23×0.57-0.65×0.57=0.65+0.57×0.57-0.23×0.57=0.65+(0.57-0.23)×0.57=0.65+0.34×0.57

=0.8438

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