1. Stating the problem: We need to add the lengths given in different units: 0.75 m, 231 dam, 25000 mm, 2.25 dm, and 1.94 hm. 2. Convert all units to meters (m) for easy addition: - 0.75 m is already in meters. - 231 dam (decameters) = 231 \times 10 = 2310 m. - 25000 mm (millimeters) = 25000 \div 1000 = 25 m. - 2.25 dm (decimeters) = 2.25 \div 10 = 0.225 m. - 1.94 hm (hectometers) = 1.94 \times 100 = 194 m. 3. Add all converted values: $$0.75 + 2310 + 25 + 0.225 + 194 = 2530.975$$ 4. Final answer: The total length is $$2530.975\text{ meters}$$.