小学数学三年级《三下口算除法》课件维语.ppt

, ,1. 84= 93= 355=427= 142= 246=,2,3,7,6,7,4,2. 60 ( ) . 400 ( ) .240 ( ) ( ) .（,6,40,2,4, ., ., ., , .,124,600,60,60, , , , ,“ 603 ”,“60 3 ”, .,6003= : ,6 3 = 2 =,200,=2000, 60003,200,6 3 = 2 =,2000,603=, :, 63=,2 ,=20,20,10,2403=,240 3 = 80 =,80,80,100, 21007 40005 ,21 7 = 3 =,=300,800,=800,300,4 5 = 8 =, .80 240 ( ) .6 540 ( ) .4 800 ( ) .2 10000 ( ) .,3,90,200,5000,