小学数学人教二年级整百整千加减法-(4).ppt

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,加减法,万以内数的认识,1.,口算。,40,50,90,60,80,50,60,30,20,70,10,90,60,20,100,70,复习,90,30,90,30,90,100,30,40,2.,填一填。,（,1,）,80,里面有,(),个十；,150,里面有,(),个十。,（,2,）,500,里面有,(),个百；,1300,里面有,(),个百。,（,3,）,4000,里面有,(),个千；,10000,里面有,(),个千。,（,4,）,2000,里面有,(),个千；,2000,里面有,(),个百。,8,15,5,13,4,10,2,20,1000,元,2000,元,探究新知,用加法计算：,1000,2000,（元）,1,个千,2,个千,3,个千,3000,先把,0,前面的数相加减，再在得数末尾添上,3,个,0.,1000,元,2000,元,探究新知,用加法计算：,1,2,3,1000,2000,（元）,3000,冰箱比电视贵多少钱？,1000,元,2000,元,用减法计算：,探究新知,2000,1000,（元）,1000,900,600,1500,600,80,50,130,130,50,80,想加法：,50,(),130,130,50,80,80,1500,900,试一试。,8,个十加,5,个十是,13,个十，就是,130,。,探究新知,70,50,800,900,120,50,1700,900,200,400,3000,6000,600,400,9000,3000,1.,计算。,知识运用,600,200,9000,6000,120,70,1700,800,97,页,1.,捉鼠竞赛。,4000,160,80,750,30,1300,1000,540,260,4200,300,6300,500,4600,400,750,30,1300,1000,540,260,4200,300,6300,500,4600,400,3.,算一算，并说一说你是怎样算出来的。,780,2300,800,4500,6800,5000,720,300,280,3900,5800,4200,（,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）,4.,桂林山水美，喜迎天下人。,（,2,）民俗度假村比假日宾馆多住了多少人？,2000,600,1400,（人）,4.,桂林山水美，喜迎天下人。,（,3,）你还能提出哪些数学问题？你会解答吗？,课堂作业,作业：第,97,页练习十九，第,3,题。,第,98,页练习十九，第,4,题。,