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1.让学生依据生活和学习的经验,依据数量之间的关系,感受和理解字母表示数的意义及方法,并能正确地用含有字母的式子表示数量之间的关系,知道含有字母的乘法式子的简写方法,能正确、合理和灵活地表示含有字母的乘法式子。2.通过经历用字母表示数的探究、发现等研究过程,让学生理解和掌握用字母表示数的思想及思想方法,并能应用所形成的思想方法用字母表示数,用含有字母的式子表示数量、数量关系,解决生活中的简单的实际问题,发展学生的数学思维,初步形成数学代数思维能力。3.通过经历所创设的用字母表示数的问题探究情境和解决实际问题的过程,让学生体验和感受用字母表示数的价值,发展学生的数学思想,感受数学学习的快乐。
1. Let students based on experience of living and learning, based on the relationship between the number of feelings and understand the meaning of the number of letters and methods, and the correct use of letters containing formulas that the relationship between quantity, know that contains letters Multiplication formula shorthand method, can correctly, reasonably and flexibly express the alphabetical multiplication formula. 2. Through the use of the number of letters to explore the discovery and other research process to enable students to understand and master the idea of using the number of letters and thinking methods and can use the resulting method of thinking alphanumerical expression with letters containing the formula Representing the relationship between the quantity and the quantity, solving the simple practical problems in life, developing students’ mathematical thinking and initially forming mathematical algebra thinking ability. 3. Through experience created by the number of letters to explore the situation and the process of solving practical problems, let students experience and feel the value of the number of letters, the development of students’ mathematical thinking, experience the joy of math learning.