一、教学内容:六年制小学数学课本第十册88至89页例1、例2二、教学目标1.理解异分母分数加减法的算理。2.掌握异分母分数加减法的计算法则。3.能正确地计算异分母分数加减法。4.培养学生的自学能力。5.渗透事物普遍联系和矛盾转化的辩证唯物主义观点。三、实现教学目标的建议异分母分数加减法的教学重点,是掌握计算法则,难点是理解算理。由于有“通分”和“同分母分数加减法”的基础,因而教学时,可以紧紧抓住“异 First, the teaching content: six-year primary school mathematics textbook Tenth volumes 88 to 89 Example 1, Example 2 Second, the teaching objectives 1. To understand the arithmetic of addition and subtraction of different denominator. 2. master different denominator method of adding and subtracting the law. 3. Can correctly calculate different denominator fraction addition and subtraction. 4. develop students self-learning ability. 5. Dialectical things universal contact and contradictory transformation dialectical materialist point of view. Third, the recommendations to achieve teaching goals Different points denominator addition and subtraction of teaching emphasis is to master the rules of computation, the difficulty is to understand the arithmetic. Due to the “pass points” and “with the denominator fraction addition and subtraction,” the foundation, so teaching, you can firmly grasp the "different