Dexter rode his bike 9/10 Miles from his house to the store then he rode 4/10 miles his uncle house use the benchmark to estimate how far he rode his bike altogether

Since he rode 9/10 to the store and 4/10 to his uncles house now, total distance covered is

9/10+4/10=13/10miles or 1.3miles

Step-by-step explanation:

First you find the total distance he rode by adding both distance he traveled then devide.