论文部分内容阅读
一、复习准备１ 出示卡片（如左）。讨论 :（１）这些小数都变成了整数 ,小数点是怎样移动的？（２）它们的大小发生了怎样的变化？２ 依次出现下列投影片。讨论 :（１）口答各式的积 ,并说出１５×５＝７５的意义及各部分名称。（２）整数乘法的计算法则是怎样的？（３）从左?
First, review preparation 1 to produce cards (as left). Discussion: (1) These decimals have become an integer, the decimal point is how to move? (2) What happened to their size? 2 The following slide appears in order. Discuss: (1) Answer all kinds of products, and say 15 × 5 = 75 meaning and the name of each part. (2) integer multiplication of the law of calculation is what? (3) From the left?