Kindergarten · Number and Operations in Base Ten

CCSS.MATH.CONTENT.K.NBT.A.1

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.

Read this standard on the official Common Core site

Lessons that teach this standard

• Teen Numbers: Ten and Some More

  Kindergarten place value: see the numbers 11 to 19 as ten ones and some more ones, with ten-frames, drawings and number sentences like 14 = 10 + 4.