South Carolina Get Ready Grade 5 Mathematics Chapter 5

$\frac{3}{4}$

$\frac{5}{8}$

$\frac{7}{8}$

$\frac{4}{16}$

Since $\frac{7}{10}$ plus $\frac{1}{5}$ is $\frac{8}{15}$ is reasonable.

Since $\frac{8}{15}$ is less than $\frac{7}{10}$, the total of $\frac{8}{15}$ is not reasonable.

The fractions $\frac{8}{15}, \frac{7}{10},$ and $\frac{1}{5}$ are all less than $\frac{1}{2}$, so the total of $\frac{8}{15}$ is reasonable.

The fraction $\frac{8}{15}=\frac{16}{30},$ and the fraction $\frac{7}{10}=\frac{21}{30},$ and $\frac{16}{30}$ is less than $\frac{21}{30}$, so the answer of $\frac{8}{15}$ is not reasonable.

Since $\frac{7}{10}$ and $\frac{1}{5}$ are each less than $\frac{8}{15}$, the answer $\frac{8}{15}$ is reasonable.