YourTeacher.com - Your Personal Math Teacher Inside Every Lesson

Demo Lesson!

Argosy University

Pre-Algebra: Lesson 046

Multiplication and Division
Multiplying Fractions

Lesson Description

Students learn to multiply fractions by multiplying across the numerators, and multiplying across the denominators. For example, to multiply 1/2 x 3/7, multiply across the numerators, 1 x 3 = 3, and multiply across the denominators, 2 x 7 = 14. So 1/2 x 3/7 = 3/14. Students also learn to cross-cancel when multiplying fractions. For example, to multiply 3/5 x 5/9, the 3 and 9 cross-cancel to 1 and 3, and the 5 and 5 cross-cancel to 1 and 1. Therefore, 3/5 x 5/9 can be rewritten as 1/1 x 1/3, and multiplying across the numerators and denominators, 1/1 x 1/3 = 1/3.

Thousands of Online Math Lessons

Middle School
High School Math

Pre-Algebra
Algebra 1
Geometry
Algebra 2

Community College
College Math

College Pre-Algebra
Introductory Algebra
Intermediate Algebra
College Algebra

Find the Lesson You Need

Textbook Search

Our lessons matched
to your textbook

Keyword Search

Search our lessons
by keyword:

Standardized
Test Prep

SAT
ACT
GED
ACCUPLACER
COMPASS
CLEP
GRE
GMAT
ASVAB
PRAXIS
TEAS

more tests...

Placement Test Prep

I have two boys in high school and yourteachermath has been unbelievably helpful. I have subscribed for another year and can't imagine not having their expertise when we need it!!!