Explanation:
Two tables are placed side by side. One table is 6 feet 6 inches wide, and the other is 6 feet 10 inches wide. Together, how wide are they?
6 feet 6 inches + 6 feet 10 inches = 12 feet 16 inches
because there are 12 inches in one foot, 12 feet 16 inches can be reduced to:
13 feet 4 inches wide
[16 inches - 12 inches = 1 foot 4 inches]