This is a great way to integrate Social Studies into your Math formative assessment! Mix it up a little bit as students move around the room answering rounding questions based on the average population of colonies of the three colonial regions from 1720-1780. This adequately assesses the fifth grade standard which states that students will be able to "Use place value understanding to round decimals to any place", while also allowing students to investigate the population of various colonies to draw conclusions about colonial regions during this time.
I use this activity as a formative assessment after I teach rounding decimals. Just hang the 5 stations throughout the room and copy a recording sheet for each student. Students will love moving around the room with a clipboard finding the answers to the scavenger hunt.
If you like this activity, check out these other great products for Math and Social Studies:
5th Grade Math Common Core Vocabulary Complete Pack *ALL DOMAINS*
5th Grade Math Spiral Review for Common Core Skills *100 Review Sheets*
5th Grade Math Benchmark Test
Mean, Median, Mode, Range *Math Lib* Task Rotation Activity
US History / Social Studies Daily Spiral Review *120 Daily Review Sheets!*