Composer to 10

Knows number combinations to totals of 10. Quickly names parts of any whole, or the whole given parts. Doubles to 20.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • "9 and 9 is 18."
  • Shown 10, then 7 are secretly hidden and the remaining 3 are shown, a child quickly says “7 are hidden.”

Help your student become a(n) Composer to 10

Activities promote meaningful knowledge of all combinations up to totals of 10. Like most composing number levels, they use visual models (conceptual subitizing) and thinking strategies. For example, children understand the ideas of "add (or subtract) zero" (same number) and "add (or subtract) 1" (next or previous number). They also use  commutativity (if I know 8 + 2, I know 2 + 8) and associativity (7 + 9 + 1  is 7 + (9 + 1) is 7 + 10 is 17).  Activities do not use timed tests and drill without understanding.

Special Thanks To

Institute of Education Sciences
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through grant numbers R305K050157, R305A120813, R305A110188, and R305A150243. to the University of Denver. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.