In this lesson, students use their understanding of multiplication and division to estimate products and quotients. This is the first of several lessons in which students use multiplication and division to make estimates of large quantities. All lessons, except the next, use a context of volume.

Students make estimates about the amount of milk consumed by different groups and the number of days it would take these groups to consume 10,000,000 cubic centimeters of milk. The estimates are structured to build on one another allowing students to use the associative property of multiplication.

What connections did students make between the different strategies shared? What questions did you ask to help make the connections more visible?