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What's the sum of 5 feet 9 inches and 12 feet 3 inches?

1 Answer

3 votes
i)

1 foot is a larger unit that 1 inch,

exactly: 1 foot = 12 inch.

ii) we add same units, that is we add feet to each other, and inches to each other:

5 feet 9 inches + 12 feet 3 inches = (5+12) feet +(9+3) inches

=17 feet 12 inches

iii)

since 12 inches = 1 foot,

17 feet 12 inches = 18 feet.


Answer: 18 feet
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