1. Start by ignoring the negative sign in front of the first number, -9.
2. Rewrite the calculation as -9 + 1.
3. Now, proceed with finding the sum of -9 and 1, which is equal to -8.
4. Therefore, the difference between -9 and -1 is -8.
Describe the steps to finding the difference using words: -9 - (-1)
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