“去括号法则”是各种版本初中数学教材上的教学内容,学生学习时会经常出现错用法则的现象。通过“去括号法则”和“用乘法分配律取代去括号法则”的应用,可以培养学生全方位考虑问题的能力;培养学生的观察能力和归纳知识的能力;培养学生初步的辩证唯物主义观点。 “To the bracketed rules ” is the teaching content of the various versions of junior high school mathematics textbooks, students often mistaken use of the law phenomenon. Through the application of the “bracketed rule” and the “multiplication assignment rule to replace the bracketed rule”, students’ ability to think in all aspects can be cultivated; the students’ abilities of observation and induction can be nurtured; and the students’ initial dialectics can be cultivated Materialist perspective.