9⼀20÷[3⼀2×(0.4 4⼀5)]的简便运算?

2024-11-03 01:21:30
推荐回答(1个)
回答(1):

9/20÷[3/2×(0.4 + 4/5)]
=9/20÷(3/2x1.2)
=9/20÷9/5
=1/4