(1)根据负数都小于0得出-59<0,
故答案为:<;
(2)∵|-0.1|=0.1,|-0.2|=0.2,
∴-0.1>-0.2,
故答案为:>;
(3)∵ 2=9,2 3=8,
∴3 2>2 3,
故答案为:>.