In this lesson, students will solve word problems involving multi-digit multiplication and division. Solve multi-step word problems involving multiplication and division, including those that require the interpretation of the remainder. Solve multi-step word problems involving all four operations, including those that require the interpretation of the remainder. Write an expression or equation to represent a real-world context, including using a letter to represent an unknown. Students solve word problems that require them to apply their newly acquired multi-digit multiplication and division skills and, in some cases, are asked to represent those word problems with expressions that they then evaluate to solve.