If you add the 529 meters more that Allison rode to 850 meters it adds up to 1379 meters which is 1 kilometer and 379 meters, and then you add the kilometer to it and its a total of 2 kilometers and 379 meters
I think the answer would be like... The 6 in each place is worth a different amount. Like just the 6 in the tenths place is worth less than the 6 in the tens place.
