人教版四年级数学上册第一单元第十一课时ppt.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,*,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,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,*,用计算器计算,亚东第一小学：丁宝生制作,金蛋,1,金蛋,2,金蛋,3,返回,99991,99992,99993,99994,99995,99997,99999,金蛋,1,9999,19998,29997,39996,49995,69993,89991,112234=,111222334=,111122223334=,金蛋,2,111111222222333334=,111122233334,N,个,N,个,N-1,个,33,333,3333,33333,3333,N,个,对计算器这个新朋友说一句最想说的话！,金蛋,3,2222222255555555,8,个,8,个,练一练,25=,2255=,222555=,22225555=,10,1210,123210,12343210,=1234567876543210,11=,11 11=,111 111=,1111 1111=,11111 11111=,_ _=_,1,121,12321,1234321,123454321,111111,111111,12345654321,用计算器计算，并找一找各组题的规律。,（,1,）,9,9-1=,98,9-2=,987,9-3=,9876,9-4=,80,880,8880,88880,98765,9-5=,987654,9-6=,课堂检测,A,888880,8888880,用计算器计算，并找一找各组题的规律。,（,2,）,12,9-8=1239-7=,1234,9-6=,12345,9-5=,100,1100,11100,111100,123456,9-4=,1234567,9-3=,1111100,11111100,（,3,）,1428571,1428572,1428573,1428574,1428575,1428576,142857,285714,428571,571428,714285,857142,（,4,）,11,1111,111111,11111111,1111111111,111111111111,1,121,12321,1234321,123454321,12345654321,用计算器计算，并找一找各组题的规律。,（,1,）,19+9,9=118+,98,9=117+,987,9=1116+,9876,9=,100,1000,10000,100000,11115+98765,9=,100000,0,111114+987654,9=,10000000,课堂检测,B,用计算器计算，并找一找各组题的规律。,（,2,）,（,10-1,）,9=,（,200-2,）,9=,（,3000-3,）,9=,（,40000-4,）,9=,1,22,333,4444,（,500000-5,）,9=,（,6000000-6,）,9=,55555,666666,（,3,）,49,4499,444999,44449999,4444499999,36,4356,443556,44435556,4444355556,（,4,）,3535,335335,33353335,1225,112225,11122225,用计算器算一算，看看红色方框中,9,个数的和与方框中间的一个数有什么关系。,要使,方框内,9,个数的和是,153,，该怎样框？,(5),再见,