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有理数运算是初中数学中一切运算的基础,在掌握有理数的概念、运算法则和运算律的前提下,如能注意分析题目结构,分析数字之间的内在联系,就能够找到解题捷径,取得理想的解题效果.下面举例说明有理数计算的若干技巧,供同学们参考.一、巧分离例1计算-10 1/4+13 1/2-12 1/3+11 1/6析解本题宜用整数与分数分离,分数部分一起通分.
Rational number operation is the basis of all arithmetic in junior high school mathematics. Under the premise of mastering the concept of rational number, arithmetic and operation law, if we can pay attention to analyze the subject structure and analyze the internal relations between numbers, we can find the shortcut to solve the problem and achieve the ideal The following example illustrates a number of rational number calculation skills for the students reference. A clever separation Example 1 Calculation -10 1/4 +13 1 / 2-12 1/3 +11 1/6 Analysis of the problem should be Use integers and fractions to separate fractions of scores together.