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Transcript

  • find the sum or difference of rational numbers in simplest form
Objective

Add and Subtract Rational Numbers

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Equivalent Ratios

Joey and James each ordered a medium cheese pizza.Joey ate four-eighths of his pizza. James one-half of his pizza.Did one of them eat more than the other?

Equivalent Ratios

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Answer

Sarah spent four-sixths of an hour reading.Jamila read her book for eight-twelfths of an hour reading.Did one person read more than the other?

Equivalent Ratios

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Answer

Rewrite the fraction seven-ninths with a denominator of 54.

Equivalent Ratios

Equivalent Ratios

Common Denominators

To find a least common denominator: Step 1: Find the least common multiple between 4 and 6. Step 2: Rewrite the fractions with the LCM as a common denominator. Step 3: Add (or subtract) the parts of the whole.

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Answer

Fractions with different denominators are measurements in different units.Fractions cannot be added or subtracted until they have common denominators.

Least Common Denominator

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To find a least common denominator: Step 1: Find the least common multiple between 4 and 6. Step 2: Rewrite the fractions with the LCM as a common denominator.Step 3: Add (or subtract) the parts of the whole.

Answer

Fractions cannot be added or subtracted until they have common denominators.

Least Common Denominator

To find a least common denominator: Step 1: Find the least common multiple between 4 and 6. Step 2: Rewrite the fractions with the LCM as a common denominator.Step 3: Add (or subtract) the parts of the whole.

Fractions cannot be added or subtracted until they have common denominators.

Add and Subtract Rational Numbers

To find a least common denominator: Step 1: Find the least common multiple between 4 and 6. Step 2: Rewrite the fractions with the LCM as a common denominator.Step 3: Add (or subtract) the parts of the whole.

Remember - whole numbers are fractions with a denominator of 1.

Least Common Denominator

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Way to Go!Time to multiply and divide!