To add $-37 + (-62)$, follow these steps:

1. Recognize that adding two negative numbers results in a more negative sum.
2. Add the absolute values of 37 and 62:
   $37 + 62 = 99$.
3. Since both numbers are negative, the sum is negative:
   $-37 + (-62) = -99$.

Thus, $-37 + (-62) = -99$.

Would you like more details or have any questions? Here are some related topics:

1. How do you add two positive numbers?
2. How do you add a positive number to a negative number?
3. What happens when you subtract negative numbers?
4. How do you multiply negative numbers?
5. What are absolute values, and how do they affect arithmetic operations?

Tip: When adding two negative numbers, always add their absolute values and keep the negative sign for the sum!