论文部分内容阅读
“9加几”是学生学习20以内进位加的起始内容。通过这部分内容的教学,一方面可以引导学生初步感受利用已有知识和经验解决新的计算问题的基本过程,体会解决问题方法的多样性,积累探索学习的经验;另一方面,也有助于学生在不同计算方法的比较中初步感受“凑十法”的简捷和便利,培养初步的选择意识和优化意识,并为进一步探索“8、7加几”以及“6、5、4、3、2加几”的计算方法提供支持。
“9 plus a few ” is the starting content for students learning within 20 plus carry. Through this part of the content of teaching, on the one hand you can guide students to initially experience the use of existing knowledge and experience to solve the basic problem of new computing process, to understand the diversity of problem-solving methods, accumulation of exploration and learning experience; the other hand, it also helps In the comparison of different calculation methods, the students initially felt the simplicity and convenience of “Minato Ten”, nurtured the initial awareness of choice and optimization, and further explored “8,7 plus” and “6,5 , 4,3,2 plus a few ”calculation method to provide support.