小学数学四年级《生活中的小数》课件维语.ppt

4- 2- , ,3.1415926,0.875,0.142857,0.5,10.00, , 50 7.98, 1.41., 39.4。, 38.2 !,0.90,2.85 ,5.98 , , ,:4.68,4.5,1.2,80,145,0.95,1.32, - .,80,145,0.95 ,1.32 , , ., 。,80,_,1=100 ， 100,80 =80100 =0.8 ,80,145,0.95,1.32, 。,80,_,1=100 ， 100,80,145,0.95,1.32, 100 .,80 =0.80 =0.8, : 145 ,23=( ) ,1350 = ( ) ,7450 = ( ) ,9020 = ( ) , ,0.95,_,0.95 =0.95100 =95 , 。,80,145,0.95,1.32,1=100 ， 100,0.95米,_厘米,0.95 =95 ,1=100 ， 100, 0.95 .,80,145,0.95,1.32, 。, :1.32=_ , ,0.3=( ) ,0.86 = ( ) ,2.63 = ( ) ,3.7 = ( ), , ,6 ,4 ,3 0.1,5 ,8 0.1 2 0.01, ,0.6,0.3,0.82,0.04,0.65,0.5,6540,0.073,0.29,5.48,4.005,6.03,18,0.45,7520,36,80.1,980,603 =（ ） 400.5 =（ ） = 5480 （ ） 2 9 =（ ） 73 =（ ） 450=（ ） ,7.520 =（ ）, 8.01 =( ) 0.18 =（ ） ,3.6 =（ ）, 9.8 =（ ） ,6.54 =（ ） , ., ,？,_ “ ” “” “=” .,10 1 _ 10.01 ,900_ 0.09 ,32_ 0.32,0.05 _ 500 ,532 _ 5.320 ,2.54 _=_ 2540 , 2400-3400 150000-200000 .( ), , !,