下面是我們学校过去对实数絕对值教学的简要情况,介紹出来供教师們参考。 1.在初二代数中講授了絕对值的定义以后,应該有較多的練習。开始时,使他們根据定义,求下列各式的值使他們对定义,达到充分掌握,並能熟練地运用。然后使他們習慣于下列等式: The following is a brief summary of our school’s past absolute value teaching, introduced for teachers’ reference. 1. After teaching the definition of absolute values ​​in the first two algebras, there should be more practice. At the beginning, they were asked to use the following formulas according to their definitions to make them fully aware of the definitions and use them skillfully. Then make them accustomed to the following equation: