45.5-(10.5-4.78)用简便方法

45.5-(10.5-4.78)用简便方法
2025-04-13 06:53:02
推荐回答(1个)
回答1:

45.5-(10.5-4.78)
=45.5-10.5+4.78
=35+4.78
=39.78