Multiplication is defined as:

(Number of Groups) x (Amount Per Group) = (Total Amount)

With this, there are two ways to think about division: measurement and partitive division. This refers to whether we are missing the number of groups or the amount per group.

Equal Groups problems are the most basic types of multiplication word problems. These are problems where objects are being split into equal groups. Multiplicative Comparison problems look at using multiplication to compare two groups. Area problems are multiplication problems involving the area of a region. Combination problems are problems where we need to pick one item from each of several groups.