1. Add 3/5 and 2/5: The sum of 3/5 and 2/5 is 5/5, which simplifies to 1.
2. Add -7/8 and 3/8: The sum of -7/8 and 3/8 is -4/8, which simplifies to -1/2.
3. Add 1/6 and -1/6: The sum of 1/6 and -1/6 is 0.
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