=50÷300
≈0.167
=16.7%
答:实际比计划节约了16.7%
下列有关内、外力作用叙述正确的是( )
—No, I _______ the book, so I already knew the story.
对“比例尺①:1:500”和“比例尺②: ”的描述正确的是( )