Algebra Touch - An amazingly easy App that allows you to refresh your knowledge of Algebra with an interface designed for iOS devices.
Alge-Bingo - Develop your algebraic equation solving skills through playing a Bingo game. This game takes you step by step through the process of learning how to solve the most basic equation up through multiple-step equations.
KineMath - Students can manipulate twelve different functions, interact with graphs and plots, copy and export their work, and view examples for deeper understanding.
MATHsKOOL 6 - MATHsKOOL 6 contains twelve activities designed to develop skill working with advanced solving techniques.
Math Formulas - Reference Guide - This app contains over 100 math forumlas at a high school level. Most formulas have examples for ease of understanding. A great app for higher level math.
The Ruler - measure things in inches or centimeters
Math Quizzer - Math Quizzer is an interactive and fun way to, not only learn, but also to boost your skills in; Addition, Subtraction, Multiplication, and Division. It offers an easy to understand chalkboard visual, which keeps track of your "score" as you progress.
Bloomberg - Bring the power of the most trusted source for financial information to your iPad, along with tools to help you analyze the world's markets.