分析: 3.6÷1.8,0.24÷0.6,16.5÷0.1,.8÷0.08把被除数和除数扩大相同的倍数,然后按整数除法的法则计算; 0.16×0.5,0.9×0.7,1.5×3,16×0.01计算时,注意小数的位数; 2.34+3.4,4.71-0.8计算时注意小数点对齐; 0÷3.15根据0除以任何不为0的数,结果都为0. 3.6÷1.8=2, 0.24÷0.6=0.4, 16.5÷0.1=165, 0.16×0.5=0.08, 0.9×0.7=0.63, 2.34+3.4=5.74, 4.71-0.8=3.91, 1.5×3=4.5, 4.8÷0.08=60, 16×0.01=0.16, 2.5-2.5÷5=2, 0÷3.15=0. 故答案为:2,0.4,165,0.08,0.63,5.74,3.91,4.5,60,0.16,2,0. 点评: 此题考查快速计算的能力,注意小数乘除法根据法则计算,小数加减法注意小数点对齐.