简便运算(1+0.12+0.23)X(0.12+0.23+0.34) - (1+0.12+0.34)X(0.12+0.2
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/18 08:40:09
简便运算(1+0.12+0.23)X(0.12+0.23+0.34) - (1+0.12+0.34)X(0.12+0.23)
(1+0.12+0.23)X(0.12+0.23+0.34) - (1+0.12+0.23+0.34)X(0.12+0.23)
=(0.12+0.23+0.34)+(0.12+0.23)×(0.12+0.23+0.34) - (0.12+0.23)-(0.12+0.23+0.34)×(0.12+0.23)
=(0.12+0.23+0.34) - (0.12+0.23)
=0.34
再问: 请问 是不是简便啊? 我怎么看都不像啊
再答: 呵呵
=(0.12+0.23+0.34)+(0.12+0.23)×(0.12+0.23+0.34) - (0.12+0.23)-(0.12+0.23+0.34)×(0.12+0.23)
=(0.12+0.23+0.34) - (0.12+0.23)
=0.34
再问: 请问 是不是简便啊? 我怎么看都不像啊
再答: 呵呵
简便运算(1+0.12+0.23)X(0.12+0.23+0.34) - (1+0.12+0.34)X(0.12+0.2
简便运算;0.12+0.23+0.34+……+0.89=
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