On a number line, danielle drew a dot at 600. then, she drew another dot on a number that was 500 units smaller. what number was the new dot on? hope u guys

The original number is 600 - 500 = 100. The new dot is on 100.

so basicly if you make it into a equation it becomes 600-500 since you start at 6oo and you go 500 left since smaller is typically left on number lines.