MathsheetsMake a worksheet →K.NBT.A.1
See a teen number as one full ten and some extra ones.
Worksheets for this standard 1 topic
The standard, officially
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 (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.