求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便

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求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便求(1+0.12+0.23)×(0.12+0.23+0.34

求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便
求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便

求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便
(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=1×(0.12+0.23+0.34)+(0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)
=1×(0.12+0.23+0.34)+(0.12+0.23)×(0.12+0.23+0.34)-【1×(0.12+0.23)+(0.12+0.23+0.34)×(0.12+0.23)】
=1×(0.12+0.23+0.34)-1×(0.12+0.23)
=0.34