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数学源于生活又应用于生活,有理数的加法是有理数中最简单的运算之一,利用这种简单的运算可以解决生活中看似不简单的问题.下面就举例说明有理数的加法在实际生活中的应用.一、需要根据正负数的意义来解决的问题,直接运用有理数的加减法来解决例1(人教版数学教科书七年级上册习题1.3第8题)食品店一周中各天的盈亏情况如下(盈余为正):132元,-12.5元,-10.5元,127元,-87元,136.5元,98元.一周总的盈亏情况如何?
Mathematical derived from life and applied to life, the addition of rational numbers is one of the simplest rational numbers, the use of this simple operation can solve the seemingly simple problem in life. Here is an example of the addition of rational numbers in real life Of the application. First, the need to solve the problem according to the meaning of positive and negative, the direct use of rational numbers addition and subtraction method to solve Example 1 (PEP mathematics textbook grade seven exercises 1.3 eighth questions) food stores every day of the week Profit and loss are as follows (earnings are positive): 132 yuan, -12.5 yuan, -10.5 yuan, 127 yuan, -87 yuan, 136.5 yuan, 98. A week’s total profit and loss situation?