These 3 resource sheets are designed for finding the missing factor, and they are separated into the following three areas: (1, 2 and 3's), (4, 5 and 6's) and (7, 8 and 9's) basic multiplication computations. The benefits of student mastery consists of the following: 1.) Mastery of this skill greatly assists students in 3rd through 6th grades when they are given a table of related facts, and the student must determine the relationship (e.g. the missing factor) between two adjacent columns or t