This Instructional Activity is a part of the Lesson 5, Unit 7, Grade 8. Students extend their understanding of exponents to include negative exponents and explain patterns in the placements of the decimal point when a decimal is multiplied by 10 or 1/10. Students use repeated reasoning to recognize that negative powers of 10 represent repeated multiplication by 1/10. A table is used to show different representations of decimals, fractions, and exponents. The table is horizontal to mimic the structure of decimals.