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

1. Variables and Expressions

Finish the assignment

Continue to next subchapter

Exercise 45 Page 9

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

3/4

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 1/4 + 1/2Since 4 is a multiple of 2, we can multiply both the numerator and denominator of 12 by 2 to create a common denominator.

1/4+1/2

ExpandFrac

a/b=a * 2/b * 2

1/4+1*2/2*2

Multiply

1/4+2/4

Now that the fractions have the same denominator, they can be added.

1/4+2/4

AddFrac

Add fractions

1+2/4

AddTerms