Arlene is showing her work in simplifying ?7.9 + 8.2 ? 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her w

Arlene is showing her work in simplifying ?7.9 + 8.2 ? 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her work