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Pearson Algebra 1 Common Core, 2011 View details

1. Variables and Expressions

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Exercise 47 Page 9

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

7/10

Practice makes perfect

If we are going to add fractions, they need to have the same denominator. Since 10 is a multiple of 5, we can create a common denominator by multiplying the numerator and denominator in the first fraction by 2.

2/5+3/10

ExpandFrac

a/b=a * 2/b * 2

2*2/5*2+3/10

Multiply

4/10+3/10

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

4/10+3/10

AddFrac

Add fractions

4+3/10

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