近几年,各地的中考数学命题编拟了许多富有时代气息的与经济生活有关的最值型应用题.本文举例说明这类问题的常见解法.1.用不等式例1 某城市平均每天产生垃圾700吨,由甲、乙两个垃圾处理厂处理.已知甲厂每小时可处理55吨,需费用550元;乙厂每小时可处理45吨,需费用495元. In recent years, the mathematics propositions for the senior high school entrance exams have compiled many of the most value-sensitive application questions related to economic life. This article illustrates the common solutions to these problems. 1. Use inequality. Example 1 The average daily garbage generated in a city 700 tons are handled by two waste treatment plants A and B. Known factory A can process 55 tons per hour at a cost of 550 yuan; B factory can process 45 tons per hour and costs 495 yuan.