This math topic focuses on practicing basic multiplication by calculating the total number of riders in cars. Each problem presents a scenario where a fixed number of riders are in multiple cars, and students are asked to find the total number of riders. This topic is an introductory part of understanding long division concepts, where students apply multiplication to solve real-world problems involving equal groups. The problems specifically require multiplying a one-digit number by various small numbers. Each question provides two potential answer choices, reinforcing basic multiplication skills and computational verification.