四年级数学下册《街心广场》PPT课件之六(北师大版).ppt

街心广场,北师大版四年级数学下册,0.342= 0.110=2.45=,6.33= 3.4110=2.1100=,4.23= 0.011000=5.12=,0.68,1,12,18.9,34.1,210,12.6,10,10.2,30 米,2 0米,3米,2米,0.3米,0.2米,600,6,0.06,30 20 = 600,3 2 = 6,0.3 0.2 = 0.06,10,10,100,12,1.2,0.12,26,0.26,0.026,1,1,2,2,0,2,2,1,3,两个因数一共有几位小数,积就是几位小数。,0.12,0.26,0.026,8.64,86.4,86.4,0.864,53=0.53=50.3=0.50.3=,142=0.142=1.40.2=0.140.2=,32,16,512,32,1.6,3.2,1.6,0.32,1.6,3.2,0.16,请在下面各题中点上小数点。,想一想 算一算。,2040=0.20.4=24=0.020.04=,