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教学内容:义务教育六年制小学数学第三册第19～20页。 教学目的;使学生初步理解乘法的意义,掌握乘法算式的写法、读法及所表示的意思。 教具与学具:小黄花(6朵)、正方形(12个)、圆形(20个)。 教学过程:一、复习 1.口算(投影出示)。 3+5+4 18+2+3 4+5+2 6+2+7 2.板算:2+2+2+2= 3+3+3+3= 4+4+4= 1+1+1+1+1=板算后回答: (1)加法算式中的这些数(指加数)叫什么数? (2)每个算式中的加数有什么待点?(板书:相同加
Teaching content: compulsory education six years of elementary school mathematics third volumes 19 ~ 20 pages. Teaching purposes; enable students to initially understand the significance of multiplication, master multiplication formula of writing, reading and meaning. Teaching aids and learning tools: small yellow flowers (6), square (12), round (20). Teaching process: First, review 1. Mouth count (projection display). 3 + 5 + 4 18 + 2 + 3 4 + 5 + 2 6 + 2 + 7 2. Calculate: 2 + 2 + 2 + 2 = 3 + 3 + 3 + 3 = 4 + 4 + 4 = 1 + 1 + 1 + 1 + 1 = Calculate the board after the answer: (1) What is the number of these additions (refers to the addend) what is the number? (2) What is the addend of each formula?