7 feet 3 inches !
9 feet 7 inches minus 3 feet 6 inches is equal to 73 inches or 6'1 feet.
4.5 inches - 6 inches = -1.5 inches.
-12 minus -6 is -6
0 minus negative 6 is equal to 6.
5 ft 10 inches
4
Seven minus -6 is 13.
Zero
14 ft 3 in - 3ft - 8in -1in = 10ft 6 inches.
3 minus -6 is 9.
10 feet 8 inches minus 7 feet 8 inches = 3 feet