There are 16 ounces in a pound.
11.) Add all of the ounces together then divide; 11+13+8=32, 32/16 is 2. So Paul bought 2 pounds.
12.) Add ounces, find difference between 4 pounds. 26+28=54 ounces. 4 pounds = 64 ounces. 64-54=10. Carole needs to buy 10 ounces of peanuts in order to have 4 pounds of nuts.