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Pearson Algebra 1 Common Core, 2011 View details

1. Variables and Expressions

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Exercise 46 Page 9

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

5/14

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 9/14 - 2/7Since 14 is a multiple of 7, we can multiply both the numerator and denominator of 27 by 2 to create a common denominator.

9/14-2/7

ExpandFrac

a/b=a * 2/b * 2

9/14-2*2/7*2

Multiply

9/14-4/14

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

9/14-4/14

SubFrac

Subtract fractions

9-4/14

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