Ordonați descrescător numerele:
a) 222,02; 2,02; 20,22; 200,02; 22,2; 2002,202,
b) 15,645; 370,71; 9,4; 17,321; 55,482, 198,77; 214,271;
c) 40,715; 30,751; 69,2; 20,751; 401,725; 311,213.​