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Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

4. Add and Subtract Unlike Fractions

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Exercise 20 Page 297

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

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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 - (- 2/3)Since 6 is a multiple of 3, we can multiply both the numerator and denominator of - 23 by 2 to create a common denominator.

5/6 - (- 2/3)

a/b=a * 2/b * 2

5/6 - (- 2* 2/3* 2)

Multiply

5/6 - (- 4/6)

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

5/6 - (- 4/6)

a-(- b)=a+b

5/6+4/6

Add fractions

5+4/6

Add terms

9/6

a/b=.a /3./.b /3.

3/2

Calculate quotient

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Subchapter links

Guided Practice p.294

Independent Practice p.295-296

H.O.T. Problems p.296

Standardized Test Practice p.296-298

Extra Practice p.297

Common Core Review p.298