fraction-facts.pdf, Exercises of Calculus

Download fraction-facts.pdf and more Exercises Calculus in PDF only on Docsity! EAP, 1/2011 LSC-O Definition: A fraction is a numerical representation for part of a whole. Add all the pieces to get the whole: Fact: The fraction bar represents division (÷), so Any fraction with a Denominator of 1 is equal to its Numerator: Division by zero is Undefined, so the Denominator of a fraction can never be zero: Fundamental Property of Fractions . . . *We use this fact when we Reduce (or Simplify) fractions to lowest terms. Equality of Fractions . . . if and only if *We use this fact when we Cross Multiply to solve for an unknown numerator or denominator. Addition and Subtraction of fractions require a common denominator. When the denominators are different, multiply one or both fractions by another fraction that is the equivalent of 1 to create a Common Denominator; then add or subtract. You may be able to multiply the smaller Denominator by something to create the larger one: If not, then multiply the two Denominators together: Multiplication and Division of fractions do not require a common denominator. Note that it is easier to reduce before actually multiplying. To divide fractions, first invert the Divisor (second fraction) to get its Reciprocal; then multiply. Factoring before multiplying can help with reducing: 1/5 1 5 The DENOMINATOR tells how many equal pieces the whole is divided into. The NUMERATOR tells how many pieces of the whole the fraction represents. Page 1 of 2