合并同类项是人教版九年义务教育课程标准实验教科书数学科目第二章中一项重要内容.学好合并同类项对于学生学会整式的加减至关重要,同时,合并同类项又是解方程及解方程组的基础,一、同类项合并中应注意的几个问题同类项的合并是整式加减的基础和实质,要熟练地进行整式的加减运算,就必须掌握同类项的合 Merger of similar items is one of the important contents of Chapter Two of the People’s Education Edition Nine-Year Compulsory Education Curriculum Standard Textbook of Mathematics, which is very important for learners to learn the integral additions and subtractions, while merging the same items is solving equations First, the same type of merger should pay attention to several issues Merger of similar items is the basis for the whole addition and subtraction, to be proficient in the integer addition and subtraction operations, we must grasp the same type of combination