This math topic focuses on calculating the run (horizontal distance) of different structures such as roofs, slides, and hills using given slope ratios. Slopes are presented as the relationship between the rise (vertical distance) and the run (horizontal distance). Problems involve interpreting this mathematical concept and applying it to various practical examples using decimals. Each question typically provides several answer options, implying these are likely multiple-choice type questions designed to test understanding of the concept of slope from introductory levels within real-world contexts.