62.4 - 37.5 - 2.15 简便计算_数学解答

62.4 - 37.5 - 2.15 简便计算

人气：238 ℃　时间：2020-05-01 12:20:17

解答

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