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教学内容人教版《数学》三年级数学上册66页例4。教学目标探索“0和任何数相乘都得0”的意义和计算方法 ;通过对比,知道0的乘法与0的加、减法的不同点,并运用所学知识解决学习中的问题。教学重点探索“0和任何数相乘都得0”的意义和计算方法。教学难点加深学生对有关0的四则运算的认识。教具准备多媒体课件。教学过程一、复习乘法、0的加减法计算1.课件出示“7×3=”。师:结果是多少?怎么解释7×3=21的意义?生1:等于21。7×3=21表示7个3相加的和是21。师:还可以怎么说?生2:还可说成3个7相加的和是21。2.课件出示:9+0=872-0=999+0=100+0=3407-0=1237+0=0+0=0-0=
Teaching content PEP “math” third grade mathematics book 66 page example 4. Teaching objectives to explore the “0 and any number multiplied are 0” meaning and calculation method; by contrast, know 0 multiplication and 0 addition and subtraction of different points, and use the knowledge to solve learning problems. Teaching to explore “0 and any number multiplied by 0 ” significance and calculation method. Difficulties in teaching students deepen the understanding of the four operations on 0. Teaching aids to prepare multimedia courseware. Teaching process First, review multiplication, 0 addition and subtraction calculation 1 courseware show “7 * 3 = ”. Teacher: What is the result? How to explain the meaning of 7 × 3 = 21? Student 1: equal to 21.7 × 3 = 21 means that the sum of seven 3’s is 21. Teacher: What can I say? Health 2: Can also be said to be the sum of three 7 and 21.2. Courseware produced: 9 +0 = 872-0 = 999 +0 = 100 +0 = 3407-0 = 1237 + 0 = 0 + 0 = 0-0 =