This is a practice test I created that corresponds with Go Math! chapter 1 for 3rd grade. It is very helpful if you are using the Florida Math Standards (MAFS) adaptation of the Common Core. In Palm Beach County, FL, this practice test aligns directly with the District's MAFS assessment for chapter 1. Adding and Subtracting 3-digit numbers using estimation, mental math, and other strategies. Rounding and Properties of Operations.