求115-(69+55)的简便计算的答案,
问题描述:
求115-(69+55)的简便计算的答案,
答
115-(69+55)
=(115-55)-69
=60-69
=-9
求115-(69+55)的简便计算的答案,
115-(69+55)
=(115-55)-69
=60-69
=-9