There are 24 marbles in a jar. Half are blue. There are 6 red marbles. The rest of the marbles are orange. How many orange marbles are there?
There are 24/2 = <T>divide(24, 2)=12.0 blue marbles.
Blue and red marbles make up 12 + 6 = <T>add(12, 6)=18 of the 24 marbles.
Thus, there are 24-18=<T>subtract(24, 18)=6 orange marbles.
