This math topic focuses on calculating speed using given distance and time in consistent units. It includes various practical problems that require finding the speed of different entities such as bacteria, bugs, and horses, moving over differing distances and periods. Units of speed in the problems include mm/d, m/d, km/d, cm/d, cm/s, mm/hr, and mm/min, ensuring practice in basic unit conversions and arithmetic operations. The questions are structured in a multiple-choice format, providing several answer choices to test understanding and accuracy in calculations.