This Problem Set is a part of the Lesson 12, Unit 7, Grade 4. In this lesson, students convert mixed number length and capacity measurements to smaller units. (For example, they convert 3/4 gallon to 3 quarts and 3/4 foot to 9 inches.) They begin by using tape diagrams to explore the relationship between units (showing, for example, that every 1/4 gallon is equivalent to 1 quart).