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咨询 OG13 数学第142题
| On a recent trip, Cindy drove her car 290miles ,rounded to the nearest 10 miles and used 12 gallons of gasoline , rounded to the nearest gallon. the actual number of miles per gallon that Cindy 's car got on this trip must have been between ?原版解释不明白啊，哪位可以解释下啊？ |
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