人教小学数学二年级整百、整仟加减法-例11、例13.ppt

整百、整千数加减法（,1,）,二年级下册,牟尼完小：朱丽萍,1.,口算。,60,30,80,60,40,60,70,40,50,30,100,60,30,60,20,80,90,60,90,30,90,20,80,100,100,40,30,复习回顾,2.,填一填。,（,1,）,90,里面有（）个十；,140,里面有（）个十。,（,2,）,600,里面有（）个百；,1200,里面有（）个百。,（,3,）,5000,里面有（）个千；,20000,里面有（）个千。,（,4,）,3000,里面有（）个千，,4000,里面有（）个百。,9,14,6,12,5,20,3,40,用加法计算：,1000,2000,3000,（元）,1000,2000,1,个千,2,个千,3,个千,3000,1000,2000,1,2,3,1000,2000,3000,3000,1000,元,2000,元,试着算一算。,1,个千加,2,个千是,3,个千，,就是,3000,。,推进新课,2000,1000,2,1,1,2000,1000,1000,1000,怎样想？,2,个千减,1,个千是,1,个千，就是,1000,。,相,加法,：,1000,（）,2000,1000,2000,1000,1000,用减法计算：,2000,1000,1000,（元）,冰箱比电视贵多少钱？,1000,元,2000,元,绿色圃中小学教育网,、,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,。,80,50,700,800,140,50,1600,900,400,200,2000,6000,700,400,9000,4000,1.,计算。,600,300,8000,5000,130,90,1500,700,知识运用,2.,捉鼠竞赛。,4000,160,80,730,50,1000,1300,240,560,4300,200,300,6500,600,4400,740,30,1300,9000,540,260,4200,300,6300,500,4600,400,3.,算一算，并说一说你是怎样算出来的。,780,2300,800,4500,6800,5000,710,400,280,3900,5800,4200,（,1,）迎宾山庄和假日宾馆一共住了多少人？,4.,桂林山水美，喜迎天下人。,900,600,1500,（人）,（,3,）你还能提出哪些数学问题？你会解答吗？,（,2,）民俗度假村比假日宾馆多住了多少人？,2000,600,1400,（人）,通过这节课的学习，你有哪些收获？,课堂小结,人不光是靠他生来就拥有一切，而是靠他从学习中所得到的一切来造就自己。,歌德,