Question

eliza bikes $1\frac{3}{10}$ miles to the store. then she bikes $\frac{4}{10}$ mile to the library.
what is the total distance eliza bikes? write your answer as a mixed number.
$1\frac{7}{10}$ miles
after she leaves the library, eliza bikes $\frac{2}{10}$ mile to the post office.
now, what is the total distance eliza bikes? write your answer as a mixed number.
$\frac{?}{?}$ miles

Explanation:

Step1: Sum first two distances

$$1\frac{3}{10} + \frac{4}{10} = 1\frac{3+4}{10} = 1\frac{7}{10}$$

Step2: Add post office distance

$$1\frac{7}{10} + \frac{2}{10} = 1\frac{7+2}{10} = 1\frac{9}{10}$$

Answer:

$1\frac{9}{10}$ miles