In this lesson, students solve multiplication and division word problems by representing the situation with a tape diagram and writing an equation with a variable for the unknown. For example, they represent the problem "Thad sees 7 beetles when he weeds his garden. Each beetle has 6 legs. How many legs are there on all 7 beetles?" with a tape diagram, determine that the total is unknown, and write the equation 7 × 6 = b in order to determine the answer.