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一、教学内容新课标人教版四年级上册第45~46页。二、教学目标1.使学生在理解的基础上,掌握两位数乘一位数(积在100以内)和几百几十数乘一位数(积在1000以内)的口算方法。2.使学生经历两位数乘一位数(积在100以内)和几百几十数乘一位数(积在1000以内)口算方法的形成过程,体验解决问题策略的多样性。3.使学生感受数学源于生活,通过小组学习、主动探索等活动,培养学生的创新意识以及认真观察、积极思考合作的习惯。重点:掌握两位数乘一位数(积在100以内)和几百几十数乘一位数(积在1000以内)的口算方法。难点:引导学生思考不同算法的特点,选择学生能理解又优化的一种算法。三、教学过程1.复习铺垫听说咱们班的孩子个个都是计算小能手,能露一手瞧一瞧
First, the teaching content New Curriculum PEP 4 fourth grade on the 45 ~ 46 pages. Second, the teaching objectives 1 to enable students to understand, based on the master double-digit by one digit (product within 100) and hundreds of dozens of numbers by one digit (product in 1000 or less) method of calculating. 2. To enable students to experience two-digit by one digit (product within 100) and hundreds of dozens of numbers by one digit (product in 1000) the formation of the calculation method to experience the diversity of strategies to solve problems. 3. Make students experience mathematics from life, through group learning, take the initiative to explore and other activities, cultivate students’ sense of innovation and careful observation, and actively think about the habit of cooperation. Focus: master the double-digit by one-digit (product within 100) and hundreds of dozens of numbers by one digit (product in 1000 or less) method of calculating. Difficulty: Guide students to think about the characteristics of different algorithms, choose an algorithm that students can understand and optimize. Third, the teaching process 1. Review bedding We heard that all children in our class are calculating a small hand, can dew look at