资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,整百、整,千数的加减法,万以内数的认识,执教：梁慧君,1.,口算,4,5,40+ 50,2 + 7 =,20,70,8,2,80,20,6,3,60,30,2.,填一填,（,1,）,80,里面有（ ）个十；,500,里面有（ ）个百,（,2,）,150,里面有（ ）个十；,1300,里面有（ ）个百。,（,3,）,23,个十是（ ）,；,23,个百是（ ）,。,（,4,）,2000,里面有（ ）个千，,2000,里面有（ ）个百。,一、复习导入，揭示课题,9,9,6,90,90,60,8,5,15,13,230,2300,2,20,3,30,二、探究新知,1000,2000,1,个千,2,个千,3,个千,3000,1000,元,2000,元,试着算一算。,二、探究新知,2000,1000,2,1,1,2000,1000,1000,1000,冰箱比电视机贵多少钱？,1000,元,2000,元,2,1,练一练,200,400=,3000,6000=,9000,7000=,4000,1000=,600,2000,9000,3000,900,600,1500,600,80,50,130,130,50,80,想加法：,50,（ ）,130,130,50,80,80,1500,900,怎样想？,试一试。,8,个十加,5,个十是,13,个十，就是,130,。,13,个十减,5,个十是,8,个十，就是,80,。,练一练,70,50,400,600,120,50,1400,800,120,1000,70,600,游戏：,找朋友,70,50,120,50,800,900,1700,900,200,400,600,400,3000,6000,9000,3000,1.,口算（开火车）,三、知识运用,600,200,9000,6000,120,70,1700,800,(1),(2),三、知识运用：,4000-3000,1900-900,3500-2000,8800-8000,3000+5000,1600-700,800+200,3000+7000,600+900,2,、我是小小邮递员,得数是,1000,得数,小于,1000,得数是,1500,得数,大于,1500,4000-3000,1900-900,3500-2000,8800-8000,3000+5000,1600-700,800+200,3000+7000,600+900,（,1,）迎宾山庄和假日宾馆一共住了多少人？,3.,桂林山水美，喜迎天下人。,900,600,1500,（人）,（,2,）民俗度假村比假日宾馆多住了多少人？,2000,600,1400,（人）,4,、你能提出什么数学问题？你会解决吗？,每分钟行,800,米,每分钟行,1500,米,每分钟行,3500,米,课外扩展,挑战自己：,请现场的老师出题,检测你这节课的学习效果,这节课你有什么收获？,思考,：,在 里填上不同的整百数，使每边三个数的和都是,1500.,
展开阅读全文