Sorting Expressions for Addition Totals to 10 1.OA.3 / 1.OA.b3These easy to implement centers will give your first graders the practice they need to firm up decompositions / partner numbers / ways to make 6, 7, 8, 9 and 10,Includes: one work mat for each number 6-10 expression cards for all decompositions of 6, 7, 8, 9 and 104 Worksheets (Write expressions for Totals 6-8, 7-9, 8-10 and 6-10)Student and Teacher DirectionsUse with Topic B: Lessons 5,6,7,8,9,10 and later for review