a)
3dam2 = 300 m2 2dam2 90m2 = 290 m2
15hmm2 = 1500 dam2 17dam2 5m2 = 1705 m2
500m2 = 5 dam2 20hm2 34dam2 = 2034 dam2
7000dam2 = 70 hm2 892m2 = 8 dam2 92 m2
b)
1m2 = 1100 dam2 1dam2 = 1100 hm2
4m2 = 4100 dam2 7dam2 = 7100 hm2
38m2 = 38100 dam2 52dam2 = 52100 hm2