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5+4.5= 0.67-0.47= 0.3×0.3= 0.7÷100=
4-0.4= 0.82+0.18= 9÷0.9= 1.4×100=
分析:根据小数四则运算的计算法则,直接进行口算即可.
解答:解:
5+4.5=9.5 0.67-0.47=0.2 0.3×0.3=0.09 0.7÷100=0.007
4-0.4=3.6 0.82+0.18=1 9÷0.9=10 1.4×100=140.
点评:此题考查的目的是理解掌握小数四则运算的计算法则,并且能够正确熟练地进行口算,提高口算能力.
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