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Basic Math and Pre-Algebra For Dummies, 2nd Edition by Mark Zegarelli

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Part II

Getting a Handle on Whole Numbers

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webextras.eps You can use prime factorization to find the greatest common factor (GCF) of difficult numbers. To find out how, go to www.dummies.com/extras/basicmathandprealgebra

In this part…

  • Add, subtract, multiply, and divide more complex calculations involving negative numbers, inequalities, exponents, square roots, and absolute value
  • Build equations and evaluate expressions
  • Understand arithmetic word problems
  • Employ a few quick tricks to determine whether one number is divisible by another
  • Find the factors and multiples of a number, and discover whether a number is prime or composite
  • Calculate the greatest common factor (GCF) and the least common multiple (LCM) of a set of numbers

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