科教导刊
科教導刊
과교도간
THE GUIDE OF SCIENCE & EDUCATION
2012年
6期
144-145,254
,共3页
运算定律%简便计算探索
運算定律%簡便計算探索
운산정률%간편계산탐색
operation law%simple calculation%exploration
“运算定律与简便计算”是人教版教材第八册的内容，主要包括加法交换律、加法结合律、乘法交换律、乘法结合律，乘法分配律，以及这些运算定律的简单运用。在教学中，笔者发现学生普遍出现“一学就会，一做就错”，“简便不简单”的现象。于是笔者重审教材，回望教学。下文笔者侧重以变化形式多，学生最难以掌握的乘法分配律教学为例，谈谈在教学中的一些思考与实践。
“運算定律與簡便計算”是人教版教材第八冊的內容，主要包括加法交換律、加法結閤律、乘法交換律、乘法結閤律，乘法分配律，以及這些運算定律的簡單運用。在教學中，筆者髮現學生普遍齣現“一學就會，一做就錯”，“簡便不簡單”的現象。于是筆者重審教材，迴望教學。下文筆者側重以變化形式多，學生最難以掌握的乘法分配律教學為例，談談在教學中的一些思攷與實踐。
“운산정률여간편계산”시인교판교재제팔책적내용，주요포괄가법교환률、가법결합률、승법교환률、승법결합률，승법분배률，이급저사운산정률적간단운용。재교학중，필자발현학생보편출현“일학취회，일주취착”，“간편불간단”적현상。우시필자중심교재，회망교학。하문필자측중이변화형식다，학생최난이장악적승법분배률교학위례，담담재교학중적일사사고여실천。
＂Operation law and the simple calculation＂ is PEP eighth volumes of the textbook content, including the addition commutative, associative law of addition, multiplication, commutative, associative law of multiplication, multiplication distributive law, and the simple use of the law of computing. In teaching, the author found that students were generally ＂To learn, one can do wrong＂ and ＂simple but not easy＂ phenomenon. So I retried the materials, look back to teaching. Below, the author focus on variations, the most difficult for students to grasp the distributive property of multiplication for example, talks about some of the thinking and practice in teaching.
