This math topic focuses on calculating the speed of different moving objects when given their distance traveled and time taken, including unit conversions. It helps in practicing the conversion of speed units depending on changed time units. For example, problems may ask to convert speed from meters per hour to meters per day or kilometers per minute to kilometers per second. This is part of an advanced study on speed, distance, and time calculations. The problems are multiple-choice, enhancing understanding of both speed calculations and unit conversions.