62.4 - 37.5 - 2.15 简便计算

问题描述:

62.4 - 37.5 - 2.15 简便计算

无法巧算
62.4 - 37.5 - 2.15
=62.4-(37.5+2.15)
=62.4-39.65
=62.4-(40-0.35)
=62.4-40+0.35
=22.4+0.35
=22.75