170÷[680÷(320-268)]简便计算

2025-04-10 09:00:31
推荐回答(1个)
回答1:

170÷[680÷(320-268)]
=170÷(680÷52)
=170÷680x52
=170x52÷680
=170x4x13÷680
=680÷680x13
=13