六点5×1点9-65×0点九简便方法怎么写

2025-06-26 03:49:57
推荐回答(1个)
回答1:

题目中是不是漏了小数点?
6.5x1.9-6.5x0.9
=6.5x(1.9-0.9)
=6.5x1
=6.5