This Instructional Activity is a part of the Lesson 9, Unit 1, Grade 8. In the previous lesson, we approximated numbers by writing them as a single-digit integer times a power of 10. The guidelines provided by scientific notation allow us to continue to approximate numbers but now with more precision.For example, we use a finite decimal times a power of instead of using only a single digit times a power of 10. This allows us to compute with greater accuracy while still enjoying the benefits of completing basic computations with numbers and using the laws of exponents with powers of 10.