(2-3⼀4*4⼀5)⼀(1⼀12+4⼀15)用简便方法解答

2025-04-07 05:35:40
推荐回答(1个)
回答1:

答:(2-3/4*4/5)/(1/12+4/15)
=(2-3/5)/(5/60+16/60)
=7/5*60/21
=12/3
=4