Math 6

Question Analysis
This question tests the understanding of subtracting a negative integer.
The key concept is that subtracting a negative number is equivalent to adding its positive counterpart.

Key Concept Explanation
When subtracting a negative number, you convert the subtraction into addition and then perform the operation.
The formula is .

Step-by-step Solution
1. Identify the numbers: The numbers are and .
2. Convert the subtraction into addition:

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