Liezl prepared four sets of 2-dozen paper cups for her daughter's birthday party. If 5 cups were damaged and 30 were not used, how many paper cups were used?
Since 1 dozen is equal to 12 then 2 dozens of cups is equal to 2 x 12 = <T>multiply(2, 12)=24 cups.
So, Liezl prepared a total of 24 cups x 4 sets = <T>multiply(24, 4)=96 paper cups.
A total of 5 + 30 = <T>add(5, 30)=35 paper cups were not used.
Hence, 96 - 35 = <T>subtract(96, 35)=61 paper cups were used.
