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为了探讨快速计算法,用两数和的平方公式等差数列求和公式以及因式适当变换的办法,将乘法运算化为加减运算,将多位数相乘化为较少的位数相乘。这里把几个数学公式在乘法运算中的应用推荐给从事数学教学的教师们,同事们可用其培养学生运用数学知识的能力和创造性的思维能力,激发其探索和钻研精神。一、两数和的平方公式在二次乘方中的应用为了便于发现规律和叙述方便,我们列出下面二次幂值的一个表;
In order to investigate the fast calculation method, use the sum formula of the sum of the squares of the two numbers and the method of the summation of the difference series and the appropriate transformation of the factors, and multiply the multiplication into the addition and subtraction operation to multiply multi-digit numbers into fewer number of bits. Multiply. Here, the application of several math formulas in multiplication is recommended to teachers who are engaged in mathematics teaching. Colleagues can use them to cultivate students’ abilities to use mathematics knowledge and creative thinking skills to stimulate their exploration and study spirit. The application of the quadratic formula of one and two-sum sums in quadratic power To facilitate the discovery of regularity and narrative convenience, we list a table with the following quadratic power values;