3.2÷2=0.2×0.5=0.36÷0.2=0.7×4=
7.2÷0.8=0.25×4=1.25×0.8=3.2÷8=
0.5×4.7×0.2=1.72×0.9+1.28×0.9=

解：3.2÷2=1.60.2×0.5=0.10.36÷0.2=1.80.7×4=2.8
7.2÷0.8=90.25×4=11.25×0.8=13.2÷8=0.4
0.5×4.7×0.2=0.471.72×0.9+1.28×0.9=2.7
故答案為：1.6，0.1，1.8，2.8，9，1，1，0.4，0.47，2.7．
分析：本題根據(jù)小數(shù)乘法，除法的運算法則計算即可．“0.5×4.7×0．”可據(jù)乘法交換律進(jìn)行計算，“1.72×0.9+1.28×0.9”可據(jù)乘法分配律進(jìn)行簡便計算．
點評：完成有關(guān)于小數(shù)乘法與除法的運算時，要注意小數(shù)點位置的變化．
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