Give students practice adding and subtracting numbers in scientific notation with this helpful practice worksheet! This eighth-grade math worksheet begins with step-by-step instructions while walking through an example problem. Then students will use the same steps to add and subtract numbers in scientific notation on their own. Mastering adding and subtracting numbers in scientific notation prepares students to solve real-world problems with very small and very large numbers. For an added challenge, have learners complete the Multiplying and Dividing Numbers in Scientific Notation worksheet next!