body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

6. Multiply Fractions

Continue to next subchapter

Exercise 20 Page 317

Rewrite the expression so that all of the numbers are fractions. Then, multiply both the numerators and the denominators.

-2/3

Practice makes perfect

Before we evaluate the expression, let's first rewrite the expression so that all of the numbers are fractions.

3 13 * ( - 1/5 )

a bc=a* c+b/c

3* 3 + 1/3 * ( - 1/5 )

Multiply

9+1/3* ( - 1/5 )

Add terms

10/3* ( - 1/5 )

When we multiply fractions, we need to remember that the product of two fractions is equal to the product of the numerators divided by the product of the denominators. Let's find the given product!

10/3* ( - 1/5 )

MoveNegFracToNum

Put minus sign in numerator

10/3 * -1/5

Multiply fractions

10 * (-1)/3 * 5

▼

Simplify

a(- b)=- a * b

-10/3 * 5

Rewrite -10 as -2 * 5

-2 * 5/3 * 5

CancelCommonFac

Cancel out common factors

-2 * 5/3 * 5

Simplify quotient

-2/3

MoveNegNumToFrac

Put minus sign in front of fraction

-2/3

Subchapter links

Guided Practice p.314

Independent Practice p.315-316

H.O.T. Problems p.316

Standardized Test Practice p.316-318

Extra Practice p.317

Common Core Review p.318