Mental Number Line to 100

Sub Trajectory: number line estimation

Uses knowledge of number relationships and mental images, including how ones can be embedded in tens, to determine relative size and position.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • When asked, "Which is closer to 45: 30 or 50?," a child says, " 45 is right next to 50, one five away, but 30 isn't."

Help your student become a(n) Mental Number Line to 100

Activities ask children to use their mental representation numbers up to 100 to solve problems such as in the "I'm thinking of a number" game or placing a number on an empty number line labeled only with 0 and 100. Visual mediators (rulers and number lists) can help children develop the competence initially.

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.