2,5m²=0,025 dam²
1 dam²-0,025dam²= 0,975 dam²
27dam²=0,027hm²
1hm²-0,027hm²=0,973 hm²
318+227=545 m²
545m²= 0,545hm²
1hm²-0,545hm²=0,455hm²
48dm²=0,48m²
1m²-0,48m²=0,52m²
625cm²=0,625m²
1m²-0,625m²=0,375m²
21dm²=0,21m²
450cm²=0,45m²
0,21+0,45=0,66m²
1m²-0,66m²=0,34m²