1、-22/7*(22/7—22/3)*7/22*21/22(计算过程)

问题描述:

1、-22/7*(22/7—22/3)*7/22*21/22(计算过程)

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