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Question:

The sum of 2 feet 2(1/2)inches, 4 feet 3(3/8)inches, and 3 feet 9(3/4)inches is

A 10 feet 3(5/8) inches.
Explaination

First add the number of feet together and then add the number of inches.
2 feet + 4 feet + 3 feet = 9 feet.
2(1/2)in +3(3/8)in+9(3/4)in=5/2+27/8+39/4=20/8+27/8+78/8=125/8=15(5/8)in
15(5/8)in = 1ft 3(5/8), so altogether 9ft + 1ft 3(5/8)in =10 ft 3(5/8)in.