This math topic focuses on practicing the skill of finding missing values in subtraction equations that involve two-digit integers. Each question provides a subtraction problem with one unknown number, and multiple choice answers are offered, from which the correct missing integer value needs to be determined. The problems are a part of broader units which cover addition and subtraction of one and two-digit integers. This set of problems tests the ability to perform basic integer subtraction and logical reasoning to identify the correct solution from provided options.