(1)7.02×0.7=4.914,
4.914<7.02,
所以7.02×0.7<7.02;
(2)5.1×2.4=12.24,
12.24>5.1,
所以5.1×2.4>5.1;
(3)4.5×0.9=4.05,
4.5×1.1=4.95,
4.05<4.95,
所以4.5×0.9<4.5×1.1;
(4)3.5÷0.7=5,
5>3.5,
所以3.5÷0.7>3.5;
(5)4.6÷1.2=
23
6 ,
23
6 <4.6,
所以:4.6÷1.2<4.6;
(6)2.85÷0.6=4.75,
2.85×0.6=1.74,
4.95>1.74; , 故答案为:<,>,<,>,<,>.