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Verified answer
4 1/2 ha + 2,7 dam^2 - 2.100 m^2= (9/2 × 10.000 m^2) + (2,7 × 100 m^2) - 2.100 m^2
= 45.000 m^2 + 270 m^2 - 2.100 m^2
= 43.170 m^2