This Instructional Activity is a part of the Lesson 14, Unit 8, Grade 8. The purpose of this optional activity is for students to see what the figure in the warm up didn't explore: as 1 is successively divided in half, the number of digits needed to accurately describe the resulting value increases. Students likely have memorized that a half is 0.5 and a fourth is 0.25, but what is half of 0.25? How can you calculate it? Use this activity if you think your students need a reminder about place value or long division with decimals.