数学[人教版]五年级上 认识中位数ppt课件.ppt
,凯旋路小学 卢艳玲, ,:, , , , A, B, C, D, E, F, G, ,2500,1900,900,800,750,650,600,500,400,1000,2500,1900,900,800,750,650,600,500,400,2500,1900,900,800,750,650,600,500,400, :, ,2500,1900,900,800,750,650,600,500,400, ( ) .,1. ,3 10 17 30 10,3 10 10 17 30,. :10,大到小, ,1,2,3,4,5,6,7,8,50,89,88,90,98,92,95,95,50,88,89,90,92,95,95,98,(90+92) 2=91,: :91, ., ., ,1,2,3,4,5,6,7,8,50,89,88,90,98,92,95,95,50,88,89,90,92,95,95,98,(90+92) 2=91,: :91,1. ,106 103 104 120 107 33 98 97,33 97 98 103 104 106 107 120,. :103.5,(103+104) 2=103.5,大到小, ,1. ,A B C ,(1)5- ( ) .,(2) 2- 8 : 32、50、86、82、89、92、85、96 ( ).,A,B,3) 2- 7 :89、88、90、92、88、91、93 ( ).,C, ,2- 9 .(: ),86 84 50 92 87 80 83 43 88,(1) ,(2) 9 ,(3) 9 , ,86, 50 . 8 ,84,50,92,87,80,83,43,88, ,86, 43 . 7 7 ,84,92,87,80,83,43,88,3、2、6、5、20, :7.2, :5, ,3、2、60、62、68、65, :43.33, :61, , , , ., ., ,