On this problem you don't need to subtract. They want to know the total amount of people who attended so you would add.
1 1 1 (carried over numbers)
12,679 (Line it up with 8491, ones place to ones place and so on)
+8,491
21170 (answer)
Because there was no point as there was an abundant amount of rainwater after a pour, and seasonal floods in their small cities.
Answer:
Historia de Chile, que comprende importantes cambios legales, territoriales y acontecimientos políticos en Chile y sus estados predecesores.
Explanation:
In Spartan households, Men held more power than the Women, and total obedience was required for the Women.
Spartan really Value Strength (all of their boys already taken for military training from a very young age). Since women is naturally weaker, they believe that Men were the one that should lead the city
hope this helps