Add 3 feet 6 inches + 8 feet 2 inches + 4 inches +2 feet 5 intches

Question

Add 3 feet 6 inches + 8 feet 2 inches + 4 inches + 2 feet 5 intches 

Answer 1

Add

           3 feet 6 inches

        + 8 feet 2 inches

        +            4 inches

        + 2 feet 5 inches

    ------------------------

         13 feet  17 inches             [add inches separately from adding feet]

 

Now, 12 inches = 1 foot, so convert 17 inches to 1 foot 5 inches:

 

          13 feet

       +  1 foot   5 inches

  -----------------------------

         14 feet  5 inches

Answer 2

3' 6" + 8' 2" + 4" + 2' 5"

3' + 8' + 2' + 17"          add the inches

13' + 17"                      add the feet

13' + 1" + 5"                convert 15"

14' + 5"                       add the feet