课件13张PPT。街心广场北师大版四年级数学下册0.34×2=
0.1×10=
2.4×5=6.3×3=
3.41×10=
2.1×100=4.2×3=
0.01×1000=
5.1×2=0.6811218.934.121012.61010.230 米2 0米 3米 2米 0.3米 0.2米 60060.0630 × 20 = 600 3 × 2 = 60.3 × 0.2 = 0.06÷10÷10÷100 121.20.12260.260.026112202213两个因数一共有几位小数,积就是几位小数。0.120.260.0268.6486.486.40.8645×3=
0.5×3=
5×0.3=
0.5×0.3=14×2=
0.14×2=
1.4×0.2=
0.14×0.2=3216512321.63.21.60.321.63.20.16请在下面各题中点上小数点。想一想 算一算。20×40=
0.2×0.4=
2×4=
0.02×0.04=