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我认为把握数学问题本质、领会数学思维方法是数学教学设计的立足点.“单项式乘以单项式”的教学是在此理念下尝试着设计的,愿与同行交流.一、教学过程简录1.回顾类比,顺势入题.教师:我们知道单项式和多项式统称整式.请同学们找出下列整式:x,2πr,5/2x-by~3,-a~2b,3/2a~2,x~2+xy+y~3,-1,ab~2中哪些是单项式?哪些是多项式?学生1:x,2πr,-a~2b,3/2a~2b,-1,ab~2是单项式,5/2x-by~3,x~2+xy+y3是多项式.教师:如何区分单项式和多项式?
I think to grasp the nature of mathematical problems, understanding mathematical thinking method is the foothold of mathematics teaching design. “Monoceded by monomial” teaching is to try to design under this concept, and is willing to exchange with peers. 1. Recalling the analogy, taking advantage of the problem. Teachers: We know that monomials and polynomials collectively. Please find out the following integral x, 2πr, 5 / 2x-by ~ 3, -a ~ 2b, 3 / 2a ~ 2, What are polynomials in x ~ 2 + xy + y ~ 3, -1, ab ~ 2? Students 1: x, 2πr, -a ~ 2b, 3 / 2a ~ 2b, -1, ab ~ 2 are Monomial, 5 / 2x-by ~ 3, x ~ 2 + xy + y3 is a polynomial. Teacher: How to distinguish between monomials and polynomials?