口算 3.6÷1.8=0.24÷0.6=16.5÷0.1=0.16×0.5=0.9×0.7=2.34+3.4=4.71-0.8=1.5×3=4.8÷0.08=16×0.01=2.5-2.5÷5=0÷3.15=
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解: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