In the class of 24 students, half are doing silent reading, and a third are playing board games. The rest are catching up on homework. How many students are catching up on homework?
24/2=<T>divide(24, 2)=12.0 students are doing silent reading.
24/3=<T>divide(24, 3)=8.0 students are playing board games.
So 12+8=<T>add(12, 8)=20 students are accounted for.
Then 24-20=<T>subtract(24, 20)=4 students are catching up on homework.
