This document can be used two ways.
Students can find their partner or group by finding the match to their card. For example: 0.845 rounded to the nearest hundredth would be 0.85. The students with those cards would become partners. To group students in 3, add the word form cards.
The same cards can put in a math center to play the memory game by matching the standard number to the rounded number and the word name.
The pages can be copied on card stock or on address labels.