I made these as part of a center rotation with practice with the commutative property. There were four centers. One for each page of this and the commutative property center pages. The students had five minutes at each center. This made for a quick 20 minute review the day before their test (About 30 minutes after an explanation of each center). If student finished early with either part, they were instructed to create their own problems and have a friend solve them. What was also great about this is that I kept the baggies and they were then available as an activity for when the students finished other assignments early.