This math topic focuses on refining skills in long division, specifically targeting the process of identifying missing values in subtraction steps that arise during the division operation. No remainders are involved in these exercises. The topic starts with an introductory level of understanding, aiming to strengthen basic digit solving strategies within the context of long division. The primary goal is to practice finding specific missing subtracted values required to complete division calculations accurately. Each problem presents a division scenario and offers multiple-choice options to select the correct subtracted value.