This center is perfect for those students who need a little extra challenge in the classroom. This bundle includes 16 tasks, a recording sheet, and a set of tiles numbered (0-9). As students complete each task they must use their logical reasoning and problem solving skills in conjunction with their knowledge of simple addition and subtraction facts to complete each assignment. To help students in this problem solving adventure, they are given five tiles that they must only use ONCE. Recording sheets are included!