gmat数学中的表达方式Onarecenttrip,Cindydrovehercar290miles,roundedtothenearest10miles,andused12gallonsofgasoline,roundedtothenearestgallon.请问里面两个rounded是什么意思,

Question

gmat数学中的表达方式
On a recent trip,Cindy drove her car 290 miles,rounded to the nearest 10 miles,and used 12 gallons of gasoline,rounded to the nearest gallon.
请问里面两个rounded是什么意思,

Answer 1

rounded to the nearest :四舍五入到（几位数）……,误差为……
整句话的意思是；在一次旅行中,Cindy 的车开了290英里,误差10英里(也就是285~295英里)用了12加仑的油,误差1加仑(同理,11.12.5加仑).