问题 填空题 口算下面各题.2.3×0.3=0.42×0.2=1.4×O.7=0.16×0.6=1.2×0.5=2×0.45= 答案 2.3×0.3=0.69,0.42×0.2=0.084,1.4×O.7=0.98,0.16×0.6=0.096,1.2×0.5=0.6,2×0.45=0.9.