This activity can be used either before or after students have learned how to divide decimals. The purpose of the activity is to get them thinking about reasonable answers to these division problems, based on what they know about division and decimal place value. The activity is done with a partner. For each question, a division problem and a quotient are given. The quotient is not always correct for the given problem. Both students determine if they believe the given quotient is reasonable, and they write a sentence or two supporting their answer using math evidence. Then, they compare their thinking with their partner. They must come to an agreement before moving on to a new division problem. I have seen and heard some really wonderful interactions and conversations between students while thinking through this activity! However, this activity can be frustrating for students who are not fully comfortable in their understanding of decimal place value. Some of the problems (such as the ones with decimals to the thousandths place) can be modified for these students to make the activity more appropriately matched to their needs.