括号25分之五乘以四分之一加零点二五乘与二四分之九括号乘以二分之一答案是多少?

2024-11-15 16:17:47
推荐回答(1个)
回答1:

5/25×1/4+0.25×9/24)×1/2
=1/4×(1/5+3/8)×1/2
=1/4×23/40×1/2
=23/160×1/2
=23/320