(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)计算 简便

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 03:41:05
(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)计算 简便

(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)计算 简便
(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)计算 简便

(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)计算 简便
(1+0.56+0.67)×(0.56+0.67+78)-(1+0.56+0.67+78)×(0.56+0.67)
=1*(0.56+0.67+78)+(0.56+0.67)*(0.56+0.67+78)-1*(0.56+0.67)-(0.56+0.67)*(0.56+0.67+78)
=0.56+0.67+78-0.56-0.67
=78