The Trachtenberg Speed System of Basic Mathematics

Classical Summability Theory

Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks

Sequence Spaces and Summability over Valued Fields

Short-Cut Math

Quicker Approach to Quantitative Aptitude: Personal Notes of Sizil Krishna

An Introductory Course in Summability Theory

Advanced Abacus: Theory and Practice

Concise Introduction to Basic Real Analysis

A Beginner's Guide to Constructing the Universe: The Mathematical Archetypes of Nature, Art, and Science

An Introductory Course in Elementary Number Theory

The Magic of Math: Solving for x and Figuring Out Why

Basic Math & Pre-Algebra For Dummies: Edition 2

Ramanujan's Lost Notebook: Part I, Part 1

Notebooks of Srinivasa Ramanujan: Volume II, Volume 2

Math Practice, Grade 3

Head First Algebra: A Learner's Guide to Algebra I

How Numbers Work: Discover the strange and beautiful world of mathematics