(1)因为3.14×0.1=0.314 0.314<3.14 所以3.14×0.1<3.14 (2)因为0.8÷0.98≈0.82 0.82<0.98 所以0.8÷0.98<0.98 (3)因为48.5÷0.78≈62.18 62.18>48.5 所以48.5÷0.78>48.5 故答案为:<,<,>.