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20米3米2米0.3米0.2米60060.0630×20=6003×2=60.3×0.2=0.06÷10÷10÷100÷10÷10÷100121.20.12260.260.026112202213两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。3.6×31080.4×0.6121.03×0.04412想一想算一算。20×40=0.2×0.4=2×4=0.02×0.04=
