以勾股数为线进行阐述如何一步一步地实现学生在“勾股定理”的一章学习中数感培养,以使学生的计算能力得到进一步的提升,在各种的数学活动中积累下来活动经验,进一步培养学生数学学习的信心和兴趣。 Taking the number of Grouped Numbers as a line, it expounds how to realize students ’step-by-step realization of number sense training in the chapter of “Pythagorean Theorem” so as to further enhance students’ computing ability and accumulate in various mathematical activities Down the activity experience, and further develop students’ confidence and interest in math learning.