(北师大版)数学(五年级上册)《约分》教学设计（(bjnu Edition) (the fifth grade mathematics volume) to teaching design）.docVIP

(北师大版)数学(五年级上册)《约分》教学设计（(bjnu Edition) (the fifth grade mathematics volume) to teaching design） Teaching goal: click here to download the file 1. experience in the forming process of knowledge, to understand the meaning of the rational exploration method. 2. to master the method, can be done correctly to. Textbook analysis: The textbook first designed activities that looked for equal fractions, and by using fractions to represent the shaded part, they found a set of equal scores: 8/24 = 4/12 = 2/6 = 1/3. Ask the students to try to explain the reasons why the four points are equal. On this basis, to reveal the name of the concept and the most simple fraction, and to guide the method. There are two kinds of rational methods, one is a common factor of two number one removed, another is the direct use of the two number of the greatest common factor of the removal of the two methods can not, must emphasize must use which method. When teaching, teachers should let students find equal scores, then let the students try to explain why these scores are equal, teachers should guide students to express well, such as the denominator and numerator are obtained by dividing the 2, according to the scores of constant size rule, fraction size unchanged, so =. On this basis, to guide students to understand the meaning and reduced meaning, and to guide and write the format. For the most simple fraction meaning, can let the students give an example of not to. Teaching aids: Rabbit pull radish courseware or pictures. Teaching activities: teaching process Design intention First, provoking interests. The drawing or demonstration of the turnip, and the voice of the little rabbit: the little white rabbit has four large radish fields, and it has a bumper harvest in autumn. With the joy of the harvest, the four little white rabbits have pulled out the radish race. Lets all judge. Who is pulling them fast now? Show the patterns on the forty-seventh page of the textbook Two, practice exploration