11-20各数的认识,是低年级学生认识数的重要的组成部分。由于低年级儿童形象思维占优势,他们需要靠可感实物的支持进行思维。所以通过操作,来激发学生的兴趣,诱发学生的求知欲,启发学生思维,使学生感到自己是一个发现者、探索者;通过生活实践,让学生感受到数学的价值和魅力等是极其重要的。因此,在教学中要特别重视让学生动手操作、体验,引导学生 11-20 The understanding of each number is an important part of the number of students in lower grades. Because of the predominance of lower-grade children's imagery, they need to think in terms of sensory support. So through the operation, to stimulate students' interest, induce students' curiosity and inspire students' thinking, make students feel that they are a discoverer and explorer. Through life practice, it is extremely important for students to feel the value and attractiveness of mathematics . Therefore, in teaching should pay special attention to enable students to operate, experience, and guide students