用1又2分之1与它的倒数的和除十二分之五。所得的商是多少?

2025-04-18 12:27:59
推荐回答(1个)
回答1:

5/12÷(3/2+2/3)
=5/12×2/3+5/12×3/2
=5/18+5/8
=65/72