Kindergarten (MAT) Targeted Standard (NBT) Number and Operation in Base Ten Cluster: Work with numbers 11-19 to gain foundations for place value.
MAT-00.NBT.01 Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (such as 18 = 10 + 8).