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《住新房》是北师大版小学数学三年级下册第三单元乘法中的知识,其教学目标是借助“住新房”这一情境让学生探索两位数乘两位数的竖式计算方法。为了让学生更好地理解两位数乘两位数的算理,我首先引导学生估计14×12的积大约是多少,很快有学生说出积在140到170之间,这个结果令人满意,因为学生掌握了正确的估算方法。接着我进一步引导学生试着口算14×12的实际结果,这时允许他们进行合作与交流,很快学生就想出了口算过程,我随着学生的汇报,板书其
“Living in new house” is the knowledge of the multiplication of the third unit of the third grade of the third grade of the undergraduates of Beijing Normal University. The teaching goal is to help students explore the double digit multiplied by two digits Calculation method. In order to give students a better understanding of double-digit and double-digit arithmetic, I first guide students to estimate the approximate product of 14 × 12, and soon students will say that the product is between 140 and 170. This result is encouraging Satisfied because students have mastered the correct method of estimation. Then I further guide the students to try to count the actual results 14 × 12, then allow them to cooperate and exchange, and soon the students came up with the process of accounting, I report as students,