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.

Dashboard

PA

Pearson Algebra 1 Common Core, 2011 View details

4. Properties of Real Numbers

Finish the assignment

Continue to next subchapter

Exercise 68 Page 28

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

1/18

Practice makes perfect

To subtract fractions, they need to have the same denominator. In this exercise, we have two fractions with different denominators. 5/9-5/10In order to create a common denominator, we can multiply the numerator and denominator in 59 by 10, and by 9 in 510.

5/9-5/10

ExpandFrac

a/b=a * 10/b * 10

5* 10/9* 10-5/10

ExpandFrac

a/b=a * 9/b * 9

5* 10/9* 10-5* 9/10* 9

Multiply

50/90-45/90

Now that they have the same denominator, they can be subtracted.

50/90-45/90

SubFrac