Four Rational Numbers Between -2 and -1/2
Rational numbers are numbers that can be expressed as a ratio of two integers. To find four rational numbers between -2 and -1/2, we need to find numbers that lie between these two values and can be expressed as fractions.

1. Determine the Average
To find rational numbers between -2 and -1/2, we first need to determine the average of these two numbers. The average of -2 and -1/2 is (-2 + (-1/2)) / 2 = (-4/2 - 1/2) / 2 = -5/2 / 2 = -5/4.

2. Find Numbers Between the Average and -1/2
Now that we have the average, we can find rational numbers between -2 and -1/2 by finding numbers between the average (-5/4) and -1/2. Some possible rational numbers between these two values include -6/4, -7/4, -8/4, and -9/4.

3. Final Rational Numbers
Therefore, four rational numbers between -2 and -1/2 are:
1. -6/4 = -1.5
2. -7/4 = -1.75
3. -8/4 = -2
4. -9/4 = -2.25
These numbers lie between -2 and -1/2 and can be expressed as fractions. By following this method, you can easily find rational numbers between any two given values.