数学人教版五年级上《中位数》ppt哈课件.ppt
, , , , 3- ,(36.8+34.7+25.8+24.7+24.6+24.1+23.2)7=193.97=27.7(m), , ., ., : 23.1,24.1,24.7,25.8,24.6,34.7,36.8, , 7 , ., , ( ) .,- .,5(1) 3 7 : 36.8 34.7 25.8 24.7 24.6 24.1 23.2 (27.7) (24.7 ) . 7 ,.,5(1) 3 7 : 36.8 34.7 25.8 24.7 24.6 24.1 23.2 (27.7) (24.7 ) . 7 ,5(2)17 : 2008- 11,1. 7 .2 . 7 ,5(2)17 : 2008- 11,1. 7 .2 . 7 , , 17 , ,2- 1- 1- ,:84, ,89,?, 17 8,2- 1- 1- :84 : 94.5=(94+95),70,14,1. , ,(1) ( .(2) ., ( ) ., - . ., , :,(1) :4581011. ( 8 ) ( 7.6 ) .814152228 (2) : 148221528 . :22 22 . ( )(3) 6 - 160140145150142157 ( 147.5).140142145150157160,(145+150)2, ,5- 2-7 ,: .(1) - .(2) (3)2.89 , ., :, :,(2.74+2.78+2.83+2.89+2.90+3.06+3.52)7=2.96,2.89, .,5- 2- 7 ., : 2.74,2.78,2.83,2.89,2.90,3.06,3.52, ,2.96, (3.06+2.90+2.74+3.52+2.83+2.89+2.78 )7 =, 2.94 ,- 5,: 3.52,2.94,2.90,2.89,2.83,2.78,2.74,3.06, ,(2.89+2.90)2 =2.895,2.895 , ,5-,5- 2- 7 .:,(2) :2.89 ,(3)2.89 ,:4 .,(4) 2.94 ,2.74 2.78 2.83 2.89 2.90 2.94 3.06 3.52,(2.89+2.9)2=5.792=2.895,2.895 , ,1. ,(1)2.3 2.8 3.5 3.6 5.9,9 12 14 21 30,(2)12 14 21 30 9, ,1. .,(3) 15 18 24 32 33 46, :(24+32)2 =562 =28,135 138 139 140 142 145 172,(135138139140142145172) 7,10117,144.4(个), :, :,140,: ., 5 :55 57 61 62 98, , ,10 - :15 17 14 10 15 19 17 16 14 12 10 ., 23 :, , , 23 :,5- 2- 1- 7 .,172 145 135 142 139 140 138, ,135 142 138 139 140 137 136,2- ., :, , : (1) ,(2) , , ., : . : ., : ( . ), , , :, :, : : 96 96 ,火眼金睛: , :, ,:1513201719 ,(1),(2), ,: , , ,1. 5 :,2. ,(270+290)2=280, ,(2) ,(1) , :18, :16,(91215172130) 6,1046,17.3(个), :, :,(1517) 2,322,16(个), ,5- 4-2- :,:,(1) .,(2) , :19, :20.5,5- ,5- 4-1- : :,5- 4-2- : :,(2) ,(1) ., 1. ,(1) . (2) . (3) . (4) , : ., ,(1) .( ),(2) ( ),(3) .( ), , . . , :98.1 93.6 91.5 90.8 88.7 87.3 84.4 80.2,运用拓展, 6- 8 ., ,张村有个张千万,隔壁九个穷光蛋,平均起来算一算,人人都是张百万 。, :,1 ,: .,2 ,(1) . .,(3) : ,3 , .,(2) : ., ,2300, !, , , 2300 ., ,10- 10-, 900 ,:, :, 900, ,2300, :,:, 2300 , ., , 7 ., ,1200 ., ., :, ., .,900,900,900,1000,1200,1300,1500,5000,8000,1200,1200 , :,:, ,A , 1730,B , 2000, , : ( )B,A, , , ., , A 1500 ., A( 1360 ),3. , 1500.,1. ,2. ,4000 2000 2000 1200 1200 600 600,6500 4000 4000 4000 1100 1100 500 500 500, B( 1510 ), :A,(4000200021200156002) 20,2720020,1360(元),(6500400031100235003) 30,4530030,1510(元), :A,1200(元), :B,1100(元), :B, , 5 25000 . 4 20000 ., , 60000 : 21000 : 30000: 20000:1 15000 : 1 20000:2 15000 : 2 19000:3 5000: 3,Goodbye!, !,