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4.4÷11=0.3×0.3=0÷730=0.03×10-0.1=
7÷5=0.25÷0.5=0.53×7=125×0.5×0.8=
1.9×0.5=29×5=2.3×0.8=0.2×7.6×50=

解:4.4÷11=0.4 0.3×0.3=0.09 0÷730=0 0.03×10-0.1=0.2
7÷5=1.4 0.25÷0.5=0.5 0.53×7=3.71 125×0.5×0.8=50
1.9×0.5=0.95 29×5=145 2.3×0.8=1.84 0.2×7.6×50=76
分析:此题为口算题,解答此题可用简便算法进行计算,如:125×0.5×0.8可用乘法结合律,先计算出(125×0.8)的积,再用所得的积与0.5相乘,即可得出得数.计算29×5可运用乘法分配律,转化为(30-1)×5进行计算.个别常见的算式(如:0.3×0.3)及特殊算式(如:0÷730)直接就可写出得数.
点评:此题为口算题,主要考查小数乘、除法的熟练计算及灵活运用,有些算式可用简便算法进行计算,个别常见的算式及特殊算式直接就可写出得数.
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