A+ Math
This site provides children with fun, interactive activities to practice
basic facts on all levels. It uses a flash card format to reinforce
math facts through entertaining games. One beneficial feature is that
the games give "hints" to help children remember the answer, without
giving the answer to them.
Practice of Basic Facts
This link takes the user to over 100 clearly stated links, all relating
to the practice of basic facts. There are multiple links to
sites providing practice in addition, subtraction, multiplication, and more.
Arithmattack
This link leads to the game, "Arithmattack," which allows students to practice their abilities with any combination of addition, subtraction, multiplication, and division basic problems. The game has
the use competing against the clock, and tracks the player's progress.
EdHelper.com
A site that will generate worksheets, exams, puzzles and lessons on teaching the basic facts.
Math Forum
This is a part of the Math Forum web site that lists interesting
questions and answers on many number operations as well as online flash
cards
FunBrain.com
The Funbrain web site that contains numerous games on computation as well as a teacher quiz bank and resources for parents.
FunSchool.com
The Funschool web site of mathematical games on number concepts and
operations, fractions, decimals, percents, geometry, probability,
patterns and equations.