有些考查有理数加减运算的实际问题,题型虽然常见,但解答时也容易出错,请读者朋友看以下几个实际问题.出租车问题一天早上,一辆出租车从供销大厦出发,沿着东西方向行驶,若规定向东为正方向,向西为负方向,则这辆出租车一上午的行驶情况如下(单位:千米):5,-3,-4,5,-6,4,5,-7. Some of the practical problems of rational arithmetic addition and subtraction are considered. Although the questions are common, they are also prone to errors when they are answered. Readers and friends are asked to read the following practical questions. Taxi problems One morning, a taxi starts from the supply and marketing building and follows things. Driving in the direction, if the direction to the east is a positive direction and the west is a negative direction, then the taxi is driven in the morning as follows (in kilometers): 5,-3,-4,5,-6,4, 5,-7.