The water level of a river is below normal levels. It's water level is at 1 1/2 meters below sea level. During the summer, the river drops another 2 1/3 meters below sea level. What is the water level at the end of the summer?

To find the water level at the end of the summer, we need to calculate the total drop of the river below sea level.

The initial drop of the river is 1 1/2 meters below sea level.
The additional drop during the summer is 2 1/3 meters below sea level.
To calculate the total drop, we add the initial drop and the additional drop: 1 1/2 meters + 2 1/3 meters = 3 meters + 2 meters = 5 meters.
Therefore, the water level at the end of the summer is 5 meters below sea level. Answer: \boxed{5}.

To find the water level at the end of the summer, we need to add the initial water level below sea level to the amount it drops during the summer.

The initial water level below sea level is 1 1/2 meters.
During the summer, it drops another 2 1/3 meters below sea level.

Adding these two values, we have:

1 1/2 meters + 2 1/3 meters

To add these mixed numbers, we need to have a common denominator. The least common multiple of 2 and 3 is 6.

1 1/2 meters can be written as 3/2 meters.
2 1/3 meters can be written as 7/3 meters.

Now we can add them:

3/2 meters + 7/3 meters

To add fractions, we need a common denominator. In this case, it would be 6.

Multiplying the numerator and denominator of the first fraction by 3:

(3/2) * (3/3) = 9/6

Now, multiplying the numerator and denominator of the second fraction by 2:

(7/3) * (2/2) = 14/6

Now we can add the fractions:

9/6 + 14/6 = 23/6

So, the water level at the end of the summer is 23/6 meters below sea level.