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McGraw Hill Glencoe Algebra 2, 2012

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McGraw Hill Glencoe Algebra 2, 2012 View details

5. Operations with Radical Expressions

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Exercise 88 Page 421

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

13/30

Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. 5/6 - 2/5Since 30 is a multiple of 6 and 5, we can multiply both the numerators and denominators of 56 by 5 and 25 by 6 to create a common denominator.

5/6-2/5

a/b=a * 5/b * 5

5 * 5/6 * 5-2/5

a/b=a * 6/b * 6

5 * 5/6 * 5-2 * 6/5 * 6

Multiply

25/30-12/30

Now that we have a common denominator, we can proceed to simplifying the expression.

25/30-12/30

Subtract fractions

25-12/30

Subtract terms

13/30

Subchapter links

Check Your Understanding p.419

Practice and Problem Solving p.419-420

H.O.T. Problems p.420

Standardized Test Practice p.421

Spiral Review p.421

Skills Review p.421