Estimation and Mental Computation: 1986 Yearbook (YEARBOOK (NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS)) By Schoen, Harold L. and Zweng, Marilyn Books / Hardcover Books ISBN: 0873532260 / Publisher: Natl Council of Teachers of, April 1986 Price Starting at $12.51 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Very Good Very Good condition. (mathematics, problem solving, estimation theory, mental arithmetic) $12.51 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for Estimation and Mental Computation: 1986 Yearbook (YEARBOOK (NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS))