mathematics

An introduction to the language and principles of the new math. Exercises, with answers on the same page, illustrate each principle.

As the only normal person in a family of math geniuses, sixteen-year-old Livey's life takes a turn for the extraordinary when her little brother's imaginary friend, Bob, turns out to be real and, as a creature of pure math, tries to rid the world of chaos and disorder.

A preparatory guide to the SAT Math Level IIC test includes nine full-length model tests.

This delightfully illustrated big book shows just how big these numbers are with numerous comparisons.