Facile Number (to 20)

The child uses a range of non-count by one strategies:
  • Compensation
  • Using known results
  • Adding to ten
  • Commutativity
  • Subtraction as the inverse of addition
  • Awareness of ten as a teen number

The Child Who Has Facile Number Structures to 20

This child has facile number structures to 20.
He can recall a large number of number facts within 20. He uses this knowledge and his experience of structuring numbers to quickly calculate any number problem within 20.