Total ham = 4 pounds
Ham for breakfast = 1 1/2 pounds
Ham for bean soup = 8 ounces = 1/2 pounds
( since 1 ounce = 0,0625 punds; 8 x0.0625 = 0.5 pounds=1/2 pounds)
Ham for sandwiches = 1 3/4
Rest for salad.
So, to find the amount of ham used for salad, simply add the ham used and subtract to 4 (Total ham)
A. subtract the sum of 1 1/2, 1/2, and 1 3/4 from 4