这道题怎么做啊?

2025-05-10 07:13:17
推荐回答(1个)
回答(1):

x:5=0.8:25
x=0.8÷25×5
=0.8÷5
=0.16
3/20:9/50=6.5:x
x=6.5÷3/20×9/50
=6.5×20/3×9/50
=1.3×6
=7.8