1.NOS.B.3: Extend understanding of 10 as a group, collection, or bundle of ten ones, called a “ten,” to compose and decompose two-digit numbers. a. Compose and decompose two-digit numbers into tens and ones using objects or drawings, and equations (e.g., 10 + 4 = 14; 38 = 30 + 8). b. Describe a given number as the correct number of tens and ones (e.g., 14 is one ten and four ones; 38 is three tens and eight ones). c. Compose and decompose two-digit numbers in more than one way (e.g. 46 = 41 + 5 or 46 = 23 + 23).