小学数学人教新课标数学三年级下册《口算除法》PPT课件维语.ppt
, 3- 2-, ,1. ( ) . 2. . .,60 ( ) ,6,500 ( ) ,240 ( ) ,100 ( ) ,5,24,10, 3 60 , 3 , 1 , 3 , , , , 3 ,60,600,240,124,(1) , 3 60 ,60 3 =,: 20 ,20(),6 10 3 2 102 10 20.,60 3 20,:63=2:603=20,:203=60: 603=20,60) (60 3).(3, 6003 : 60003 , :6 3=2 ,=200, :6 3=2 =2000,(2) , 3 ,600 3 =,200(),: 200 ., :6 3 2 2 200.,60,30 3 =,400 2 =,10,200,9000 3 =,3000,(3) ,240 24 1024 10 3 8 10 240380,380=2402403=80,240 3 =,80(),: 80 ., 3 , :24 10 3 8 108 10 80,240, , ,2400 3 =,800,12006,200,15003,500, , ( ) , 、, . 8 240 . ( 30 ) 6 540. ( 90 ) 4 800. ( 200 ) 2 10000 . ( 5000 ),1802,182,18002,900,90,9,4005,405,40005,800,80, ,8,600,30, ,20,20,100,2000,90 3 = ()80 2 =()900 3 = ()800 2 =()15 5 =()270 9 =()150 5 =()2700 9 =(), ,30,40,300,400,3,30,30,300, ,40 2= 20( ), ,: 20 , ,60 3 .,:,63=2 ,(1)1- 240 6 , ,(2) 3- 7 280 ,240 6 =,280 7 =,: 40 ,40(),: 40 .,40(),80 4 =,90 3 =,60 6 =,9000 3 =,630 9 =,600 2 =,280 4 =,800 4 =,1200 6 =,40 2 =,7000 7 =,200 4 =,1. ,2. ,(2)180 6 ,(1)40 4 ,(3) 450 9 ,(4) 4 1600 , , ,260 240 ,260 280 ,240 4 = 60()280 4 = 70(),260, , : 10 100 1000 , : ,