I used this for my third graders, but it could be used also for anyone who needs additional work with composing and decomposing numbers. I print them back to back so that I can have an on level number and a challenge level.
After the students fill it in, you can quickly find out who still needs work with which concept. I formed small groups and met with them during our intervention and enrichment block.
This could also be a review activity, used for note taking or it could be a simple morning seat work exercise.