Subtraction tables are tools used to help individuals learn and practice the concept of subtraction. They typically display numbers in a grid format, showing the results of subtracting one number from another. For example, a subtraction table might show that 5 - 2 equals 3 and 7 - 4 equals 3 as well. These tables are especially useful for young learners and can be found in classrooms or educational materials. By using subtraction tables, students can quickly reference and memorize subtraction facts, making it easier to solve problems in math.