Post on 06-Jan-2016
description
Multiplying and Dividing Fractions
5.4A Multiplying FractionsObjective: To multiply fractions and mixed numbers. To use fraction multiplication to solve real-world problems.Write each mixed number as an improper fraction.
Warm-Up
Multiplying fractions is MUCH easier than adding fractionsYou do not need common denominatorsMultiply numerator by numerator and denominator by denominatorSimplify, if possibleProcess 1: Multiplying FractionsMultiply
Multiplying Fractions - Sample
Find the product
Practice
That last one was kind of hardis there an easier way?Find the product
Practice
You can simplify the fractions before multiplying. This will save you from having to multiply larger numbers It will also reduce the need to simplify the product
Cross-CancelingTo cross-cancel, find any common factors between the diagonals. Divide both numbers by the same factor Example:
Cross-Canceling (continued)
1213
More Practice
Try this
Multiplying Mixed Numbers
Before you can multiply mixed numbers, you must first rewrite the mixed numbers as improper fractions
Multiplying Mixed Numbers
Practice
Practice
You are hiking with a friend. The trail is
miles long. You have walked around it
times. How far have you walked? Real-World Problem
You are hiking with a friend. The trail is
miles long. You have walked around it
times. How far have you walked? Real-World Problem