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1夯实基础,提高代数式的运算代数式的运算是初中数学教学的重要内容,需要学生熟练掌握必要的公式和定理,并且根据需要结合具体的图形,灵活地运用数形结合的思想,借助数轴、平面直角坐标系等数学知识加以解决。例1实数a,b在数轴上的位置如图1所以,化简工(a~2)~(1/2)-(b~2)~(1/2)-((a-b)~2)~(1/2)此题是代数式运算中常见的题型,可以根据二次
A solid foundation to improve the algebraic arithmetic Algebraic arithmetic operation is an important part of junior high school mathematics teaching, students need to master the necessary formulas and theorems, and according to the need to combine specific graphics, flexible use of the idea of combining numbers and figures, with the number of axes, plane Cartesian coordinate system and other mathematical knowledge to be solved. Example 1 The real numbers a and b are located on the ordinate axis as shown in Fig. 1, and simplify (a ~ 2) ~ (1/2) - (b ~ 2) ~ (1/2) - ((ab) ~ 2) ~ (1/2) This question is algebraic operation common questions, according to the second