Ron walked 8/10 mile from his grandmother's house to the store then store. Then he walked 9/10 mile to his house. About how far did he walk altogether?

The total distance he walked was 17/10 miles or 1.7 miles.

Step-by-step explanation:

Ron's walk was divided into two parts, one that goes from his grandmother's house to the store and then from the store to his house. The total distance that he walked is given by the sum of the two separate parts, so in order to calculate how far he walked we will do as follows:

Total distance = 8/10 + 9/10

Total distance = 17/10 mile = 1.7 miles

The total distance he walked was 17/10 miles or 1.7 miles.