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整式在代数中的地位正如整数在算术中的地位一样。整数計算如能学得好,就对分数、小数的計算的学习打下了良好的基础;整式运算学好了,对分式、根式的运算也会有很大的帮助。其中尤其是乘法运算和乘法公式,由于在代数上用处較大,显得尤其重要。但由于內容的关系,学生学习起来,比加減法要困难一些。要学好这一部分的内容,必須使学生:(1)明确基本概念,如:方冪的运算法则a~m·a~n=a~(m+n),(a~m)~n=a~(mn),(ab)~n=a~nb~n,乘法分配律等。(2)熟练单項式的乘法、单项式的平方、单項式的立方以及正确地
The position of integers in algebra is just like the position of integers in arithmetic. Integral calculations, if they can learn well, lay a good foundation for the study of the calculation of fractions and decimals; the whole formulae are well studied, and it will also be of great help to fractional and root-based operations. Among them, multiplication and multiplication formulas are particularly important due to their large use in algebra. However, due to the content, students learn more difficult than the addition and subtraction. To learn the content of this section, students must: (1) define the basic concepts, such as: the power of the square power a~m~a~n=a~(m+n), (a~m)~n=a ~ (mn), (ab) ~ n = a ~ nb ~ n, multiplicative distribution law, etc. (2) Skilled monomial multiplication, monomial square, cube of monomials and correctly