Multiplying fractions

5 videos
4 skills
What is 2/3 of 2/3? If 4/7 of the class are boys, how many boys are there? Multiplying fractions is not only super-useful, but super-fun as well.

Multiplying unit fractions and whole numbers

VIDEO 3:08 minutes
Sal multiplies 1/2x5 using repeated addition and fraction models.

Multiply fractions and whole numbers 1

PRACTICE PROBLEMS
Practice multiplying a whole number times a fraction.

Intro to multiplying 2 fractions

VIDEO 5:06 minutes
Sal introduces multiplying 2 fractions.

Multiplying 2 fractions: 5/6 x 2/3

VIDEO 2:26 minutes
Sal multiplies 5/6x2/3.

Multiplying fractions

PRACTICE PROBLEMS
Practice multiplying two fractions.

Multiplying positive and negative fractions

VIDEO 4:33 minutes
See examples of multiplying and dividing fractions with negative numbers.

Multiplying positive and negative fractions

PRACTICE PROBLEMS
Practice multiplying fractions. Fractions in these problems may be positive or negative.

Multiplication as scaling with fractions

VIDEO 5:06 minutes
Sal compares the following expressions by thinking about multiplication as scaling: 2/3x7/8, 8/7x2/3, and (5x2)/(3x5)

Fraction multiplication as scaling

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