# Marcie jogged 0.8 mile on Wednesday and 0.9 mile on Thursday. How far did she jog on the two days?

Sep 29, 2016

1.7 miles.

#### Explanation:

The key to adding decimal fractions is to line up the decimal point.

If the decimal points are lined up above each other then like numbers will be added to each other correctly. So......

$$  0.9


+0.8

1.7

.9 = $\frac{9}{10}$ .8 = $\frac{8}{10}$ Since they are both in the tenth's place they can be added.

$\frac{9}{10} + \frac{8}{10} = \frac{17}{10}$ Which is an improper fraction

Changing the improper fraction to a mixed number gives.

$1 + \frac{7}{10}$ of 1.7