9514 1404 393
Answer:
746.7 ft²
Step-by-step explanation:
You can add them up, or you can take advantage of multiplication to make the repeated addition simpler.
(112.5 ft² +136.4 ft²) +(112.5 ft² +136.4 ft²) +(112.5 ft² +136.4 ft²)
= (3)((112.5 ft² +136.4 ft²) = 3(248.9 ft²) = 746.7 ft²
The total area of the decks on the 3 homes is 746.7 ft².