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

4. Add and Subtract Unlike Fractions

Continue to next subchapter

Exercise 2 Page 295

To add or subtract fractions, they need to have the same denominator.

- 2/3

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. - 1/15 + ( - 3/5)Since 15 is a multiple of 5, we can multiply both the numerator and denominator of - 35 by 3 to create a common denominator.

- 1/15+( - 3/5)

a/b=a * 3/b * 3

- 1/15+( - 3* 3/5* 3)

Multiply

- 1/15+( - 9/15)

Now that we have a common denominator, we can proceed to simplifying the expression.

- 1/15+( - 9/15)

MoveNegFracToNum

Put minus sign in numerator

-1/15+-9/15

Add fractions

-1+(-9)/15

Add terms

-10/15

MoveNegNumToFrac

Put minus sign in front of fraction

- 10/15

a/b=.a /5./.b /5.

- 2/3

Subchapter links

Guided Practice p.294

Independent Practice p.295-296

H.O.T. Problems p.296

Standardized Test Practice p.296-298

Extra Practice p.297

Common Core Review p.298