-72*(1/4-5/9+7/12)/(-2)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/24 02:02:35
-72*(1/4-5/9+7/12)/(-2)-72*(1/4-5/9+7/12)/(-2)-72*(1/4-5/9+7/12)/(-2)=-72X(9/36-20/36+21/36)/(-2)=-7

-72*(1/4-5/9+7/12)/(-2)
-72*(1/4-5/9+7/12)/(-2)

-72*(1/4-5/9+7/12)/(-2)
=-72X(9/36-20/36+21/36)/(-2)
=-72X(-11/36+21/36)/(-2)
=-72X(10/36)/(-2)
=-72X(-5/9)
=40