Multiplying fractions

9 videos
6 skills
We're about to have fraction fun! Life doesn't always happen in whole numbers. All around you are fractions that you will need to multiply--sometimes by whole numbers and other times by other fractions. This tutorial will give you a great conceptual and practical understanding of how and why you multiply fractions. Common Core Standards: 5.NF.B.4, 5.NF.B.4a, 5.NF.B.4b, 5.NF.B.5, 5.NF.B.5a, 5.NF.B.5b

Multiplying fractions and whole numbers

VIDEO 3:08 minutes
Don't let multiplying whole numbers and fractions get you down. We got this. This explanation will help you become a pro.

Multiplying fractions by whole numbers

PRACTICE PROBLEMS
Multiply a whole number times a fraction.

Visually understanding multiplying fractions and whole numbers

PRACTICE PROBLEMS
Use area models, number lines, and tape diagrams to multiply a whole number times a fraction.

Multiplying two fractions: an explanation

VIDEO 5:06 minutes
This video will help you think about what it means to multiply two fractions. By drawing the problem and "seeing" the answer, you'll better understand how we arrived at it.

Multiplying two fractions: example

VIDEO 2:26 minutes
Let's practice multiplying two fractions together. We'll learn to simplify the answer, too.

Multiplying fractions: visualizing

VIDEO 4:57 minutes
Here's a great way to visualize fraction multiplication problems. Once you understand this, doing them on your own will be a lot easier!

Multiplying fractions and whole numbers: two approaches

VIDEO 2:54 minutes
When faced with multiplying whole numbers and fractions, understanding these two approaches will help solve the problem.

Multiplying two fractions: number line approach

VIDEO 4:46 minutes
Fraction multiplication getting you down? No worries. This explanation which uses a number line to visualize the problem will lift your spirits.

Understanding multiplying fractions by fractions

PRACTICE PROBLEMS
Use area models, number lines, and tape diagrams to multiply a fraction times a fraction.

Multiplying positive fractions

PRACTICE PROBLEMS
Multiplying two fractions with simplification.

Multiplication as scaling

VIDEO 5:06 minutes
When multiplying fractions, it's sometimes helpful to view the operation as a kind of scaling--that multiplying the fraction times another creates a fractional proportion, or scale. Watch. You'll understand.

Fraction multiplication as scaling

PRACTICE PROBLEMS
Interpret how multiplying by a fraction greater or less than 1 affects the product. 

Multiplying mixed numbers

VIDEO 4:21 minutes
We've learned to multiplying two fractions and a fraction and a whole number. Let's move on to multiplying mixed numbers!

Multiplying fractions and whole numbers: mixed number answer

VIDEO 4:03 minutes
Sometimes the product of multiplying fractions and whole numbers is a mixed number. Mixed up? You won't be for long!

Multiplying mixed numbers

PRACTICE PROBLEMS
Multiply two mixed numbers.