text: ### Sample Problem
  
  34 ft. 4 in. - 23 ft. 8 in. + 3 ft. 3 in. = ft. in.
  
  #### Solution
  
  Recall the formula: 1 foot = 12 inches
  
  34 ft. 4 in. = 33 ft. 16 in.
  
  33 ft. – 23 ft. + 3 ft. = 13 ft.
  
  16 in. – 8 in. + 3 in. = 11 in.
  
  34 ft. 4 in. - 23 ft. 8 in. + 3 ft. 3 in. = 13 ft. 11 in.