1⼀2÷[(3⼀4+2⼀5)×20]简便计算

2025-02-23 11:52:35
推荐回答(1个)
回答1:

1/2÷[(3/4+2/5)×20]
=1/2÷(3/4×20+2/5×20)
=1/2÷(15+8)
=1/2÷23
=1/46