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3.14×0.1○3.14    0.8÷0.98○0.98
0.14÷0.1○3.14    0.45×0.45○0.45.
分析:根据小数的乘除法分别求出各自的结果,再根据小数的大小比较的方法进行解答即可.
解答:解:①3.14×0.1=0.314,0.314<3.14,所以,3.14×0.1<3.14;
②0.8÷0.98≈0.82,0.82<0.98,0.8÷0.98<0.98;
③0.14÷0.1=1.4,1.4<3.14,所以,0.14÷0.1<3.14;
④0.45×0.45=0.2025,所以,0.45×0.45<0.45.
故答案为:<,<,<,<.
点评:先求出各自的结果,再进行比较大小即可.
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