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

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 13:15:58
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

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