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Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

3. Add and Subtract Like Fractions

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Exercise 21 Page 289

To add or subtract fractions with the same denominator, we add or subtract their numerators.

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Practice makes perfect

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have three fractions with the same denominator. (81/100 + 47/100) + 19/100 Let's simplify the expression.

(81/100+47/100)+19/100

CommutativePropAdd

Commutative Property of Addition

(47/100+81/100)+19/100

AssociativePropAdd

Associative Property of Addition

47/100+(81/100+19/100)

Add fractions

47/100+81+19/100

Add terms

47/100+100/100

a/a=1

47/100+1

Add terms

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Subchapter links

Guided Practice p.286

Independent Practice p.287-288

H.O.T. Problems p.288

Standardized Test Practice p.288-290

Extra Practice p.289

Common Core Review p.290