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Pearson Algebra 1 Common Core, 2011 View details

1. Variables and Expressions

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Exercise 48 Page 9

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

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Practice makes perfect

If we are going to subtract fractions, they need to have the same denominator. Since 6 is a multiple of 3, we can create a common denominator by multiplying the numerator and denominator in the second fraction by 2.

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ExpandFrac

a/b=a * 2/b * 2

5/6-2* 2/3* 2

Multiply

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

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SubFrac

Subtract fractions

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