Fractions in Disguise: A Math Adventure [Paperback]

Crack the case with George Cornelius Factor in this entertaining math adventure that introduces simplified and reduced fractions with equal parts intrigue and humor.

When a valuable fraction goes missing, George Cornelius Factor (a.k.a. GCF) vows to track it down. Knowing that the villainous Dr. Brok likes to disguise his ill-gotten fractions, GCF invents a Reducer—half ray gun, half calculator— that strips away the disguise, reducing the fraction to its lowest common denominator and revealing its true form. With the Reducer in hand, George seeks out Dr. Brok in hopes of retrieving the missing fraction.

Back matter includes more detail on simplifying, or reducing, fractions.*Not only tackling fractions, but simplifying them, this fills a needandthoroughly entertains. George Cornelius Factor (G.C.F., get it?) collects fractions. But he's not alone: Baron von Mathematik and Madame de Géométrique also covet the 5/8 that is newly up for auction. But the nefarious Dr. Brok, a master of disguise, steals it. He can take a 1/2 and turn it into a 2/4 or a 3/6. It's still the same fraction, but it looks different. George won't be deterred. He invents a Reducer-half ray gun, half calculator-that zaps fractions into their lowest terms and goes to Dr. Brok's mansion to confront him and find the 5/8. A clever bit of detective work and a rousing action sequence later, and the 5/8 is back to its lowest terms and part of George's collection. Throughout, Einhorn finds ways to humorously add fractions to his tale--the fraction lovers bid portions of $1 million, and Brok's mansion is 1/10 of a mile tall--and painlessly describes the process of reducing them to their lowest terms. Backmatter summarizes the learning, though not as simply as the text. Clark's ink-and-watercolor illustrations truly make the characters' personalities shine. Dr. Brok looks something like professor Hinkle ofFrosty the Snowmanfame, lƒ5