(1/4+1/5)x(5/7一3/14÷3/4)简便计算

2025-03-12 01:34:47
推荐回答(1个)
回答1:

没法简算:
(1/4+1/5)x(5/7一3/14÷3/4)
=9/20x(5/7一2/7)
=9/20x3/7
=27/140