The problem cards are for practicing finding the related multiplication fact that will help solve a division problem with a three to four digit dividend. There are 72 problem cards to match in this set. They are divided into a series of 6 lessons. They can be used for centers, small groups or individual student work. They will help the child conceptualize using estimation as a strategy. They will also help the child relate multiplication to division. The break apart method is another way for a child to visualize a division problem.