This book is written to answer commonly asked homework questions of fourth, fifth, and sixth graders. Included are facts, charts, definitions, explanations, examples, and illustrations. Topics include ancient number systems; decimal system; math symbols; addition; subtraction; multiplication; division; fractions; estimation; averages; properties; story problems; measurement of length, weight, perimeter, area, volume, temperature, and time; geometric shapes; symmetry; congruence; money; graphs; statistics; probability; computers; and calculators. (MKR)