Math 6

Question Analysis
This question tests the understanding of subtracting a positive number from a negative number, which is equivalent to adding a negative number.

Key Concept Explanation
When adding two negative integers, we can think of it as combining two amounts of “debt” or “shortage”.
The rule is to add the magnitudes of the two negative numbers and then attach a negative sign to the sum.
In other words, we are aggregating the “negativeness” of the two values. For example, -a + (-b) = -(a + b).

Step-by-step Solution
1. Identify the initial temperature: The temperature at 6 AM is .
2. Identify the temperature change: The temperature drops by .
3. Apply the subtraction:

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