This math topic focuses on understanding and applying metric unit scales on maps. It covers skills such as converting and interpreting scaled distances in centimeters and millimeters based on given map scales, specifically for measurements less than 1000 in the same unit type. The problems involve determining actual distances on maps using scales like 1:20, 1:90, and up to 1:9000, enhancing the learner's ability to work with scale conversions in a practical context, essential for tasks like reading and using maps efficiently.