Chapter 2 consists of the games that require the skill levels through addition,
subtraction, and multiplication. These games consist of The Tri Game, The Fib-Tri
Game, The Multiplicative Persistence Game, The Tri-Square Game, The Tri-Squar-
-Cube Game, and The Kaprekar Number Game. These games are in general appropriate
for children in grades 1, 2, and 3, depending on the children's arithmetic skills level.
However, they can be used as enjoyable recreational games for children of all ages,
inclusive of mathematically gifted children. See the sections “Introduction to the
Games” and “Game Ideas from Teachers at Numberama Teacher Workshops” in the
beginning of this book, and some of the teacher and teacher education Numberama
workshop participant responses in the Appendix for relevant information about
playing these games effectively with children, as well as how these games were
developed.
Keywords: Recreational number theory games, The Fib-Tri game, The kaprekar
number game, The multiplicative persistence game, The Tri game, The Tri-square
game, The Tri-square-cube game.
