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0.7×0.5= 0.9×0.6= 0.5×0.8= 0.4×0.7=
0.8×0.6= 0.6×0.7= 0.5×0.9= 0.4×0.3=
分析:根据小数乘法的计算法则,直接进行口算即可.
解答:解:
0.7×0.5=0.35 0.9×0.6=0.54 0.5×0.8=0.4 0.4×0.7=0.28
0.8×0.6=0.48 0.6×0.7=0.42 0.5×0.9=0.45 0.4×0.3=0.12.
点评:此题考查的目的是理解掌握小数乘法的计算法则,并且能够正确熟练地进行口算,提高口算能力.
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