Question 7644
You probably need to review operations with signed numbers.

-40 - 52

Remember the rule: "To subtract an integer, you add its additive inverse."

So, -40 - 52 = -40 + (-52)  Adding integers with the same sign (here, they're both negative) just add their absolute values and the answer gets the same sign as the integers.

-40 - 52 = -40 + (-52) = -92