说教材一、教材内容 :人教版九年义务教育第十册第１３１—１３２页例１、例２。二、教材简析 :异分母分数加减法是在学生掌握了通分和同分母分数加减法的基础上进行教学的 ,它是分数加减法的重点 ,也是分数四则混合运算的基础。由于异分母分数加减法的关键是先通分 ,转化为同 Teaching materials First, the textbook content: PEP nine years of compulsory education tenth book pages 131-132 Example 1, Example 2. Second, the textbook analysis: Addition and subtraction of different denominators is a method for students to master the pass and the same denominator addition and subtraction method based on the teaching, which is the focus of addition and subtraction points, but also the basis for the fractional four mixed operations. As the different denominator fraction addition and subtraction method is the first pass points, into the same