Mystery Math: A First Book of Algebra (Hardcover)
A First Book of Algebra
Holiday House, 9780823422890, 32pp.
Publication Date: July 1, 2011
In this accessible first book of
algebra set in a creepy haunted
house, readers will learn to find the
unknown number of skeletons,
ravens, and bats by using simple
addition, subtraction, multiplication,
and division to solve equations.