These printables are designed for math centers, independent practice, homework, or for use in small groups. These worksheets will help students with basic addition and subtraction facts, counting on, fact families, subitizing, and speed/automaticity with math facts. Using manipulatives and Part-Part-Whole mats will reinforce students’ understanding of number bonds and parts of a whole. The answer key provides an instant self-check for students, or you may elect to collect and grade students' wor