Cameron has 4 clown fish in his fish tank. One third of the fish in the tank are clown fish. How many fish does Cameron have in his tank?

Describe how to draw a diagram to solve.

The denominator in 1/3 tells you that there are ___ equal parts in the whole group. Draw 3 circles to show ___ equal parts.
Since 4 fish are 1/3 of the whole group, draw ___ counters in the first circle.
Since there are ___ counters in the first circle, draw ___ counters in each of the remaining circles. Then find the total number of counters.
So Cameron has ___ fish in his tank