论文部分内容阅读
乘法公式是初中数学的重要内容,巧妙地使用乘法公式,可以简化计算,增加计算的趣味性,促进学生计算能力的提高．下面列举几例：1．部分用例1计算：99~2－100×98．分析100×98－(99＋1)(99－1),恰好可用平方差公式计算．
The multiplication formula is an important content of junior high school mathematics. Using the multiplication formula skillfully can simplify the calculation, increase the interest of the calculation, and promote the improvement of students’ calculation ability. Here are a few examples: 1. Some use case calculations: 99~2-100x98. Analysis of 100×98-(99+1)(99-1) can be calculated using the square difference formula.