Estimate Each Sum or Difference: 1. $\frac{ 1 }{ 6 } +\frac{ 5 }{ 8 } \approx$ 2. $\frac{ 7 }{ 8 } +\frac{ 1 }{ 16 } \approx$ 3. $\frac{ 1 }{ 10 } +\frac{ 5 }{ 6 } \approx$