There are two stations in this file. They are aligned to Common Core Standards 4.MD.1, and 4.MD.2. I used these stations with NYS Math Module 2, Unit Conversions and Problem Solving with Metric Units. These could be used in other grades as well to increase fluency, challenge students in younger grade, or to help students who struggle in higher grades.
The first station is a station where the students need to add or subtract mixed units. In order to do this, students need to convert the units to the smaller unit, add or subtract them, and then convert them back to the mixed units. Example: solve 34 kg 200 g + 6 kg 19 g. The answer would be 40 kg 219 g. There are 54 cards.
In the second station, they need to convert the units to the units that are listed on the cards. There is an example in the preview of these cards.
I handwrite the answers on the back so that they can self-check.