1. Is the equation $\frac{1}{10} + \frac{8}{15} = \frac{73}{150}$ reasonable? Use estimation to decide.
2. Estimate the sum $\frac{4}{9} + \frac{12}{13}$ by rounding each fraction to the nearest benchmark ($0, \frac{1}{2}, 1$). The best estimate is ___.
3. A student claims that $\frac{11}{12} - \frac{1}{7} = \frac{5}{12}$. Is this claim reasonable based on estimation?
4. Is the equation $4\frac{1}{8} + 1\frac{9}{10} = 6\frac{1}{40}$ reasonable based on estimation?
5. Estimate the difference $7\frac{8}{9} - 3\frac{4}{7}$ by rounding each mixed number to the nearest whole or half. The best estimate is ___.
6. Using estimation, is the calculated difference $5\frac{1}{6} - 2\frac{10}{11} = 2\frac{13}{66}$ reasonable?
7. Which of the following is the best estimate for the sum $\frac{5}{11} + \frac{8}{17}$?
8. A recipe calls for $1\frac{1}{12}$ cups of milk and $3\frac{7}{8}$ cups of water. Is it reasonable to estimate that the total amount of liquid is about 5 cups?
9. The fraction $\frac{5}{11}$ is closest to which benchmark number?
10. Which of the following fractions is closest to the benchmark 1?