22/7×21/22×(22/7-22/3)×(-7/22)=?

来源：学生作业帮助网编辑：作业帮时间：2024/05/13 07:08:23

22/7×21/22×(22/7-22/3)×(-7/22)
=-21/22×(22/7-22/3)
=-21/22×22/7+21/22×22/3
=-3+7
=4