Subtracting Fractions with Common and Uncommon Denominators

Subtract 1/2 from 3/4 and simplify the result.

• 1/4

• 5/8

• 3/5

• 2/3

If a piece of wood is 5/8 inch long and you cut off 3/16 inch, how long is the remaining piece?

• 5/16 inch

• 7/16 inch

• 3/8 inch

• 1/2 inch

A rope is 7/8 yard long. If you cut off 1/4 yard, how long is the remaining rope?

• 1/2 yard

• 2/3 yard

• 5/8 yard

• 3/4 yard

What is the first step in adding or subtracting fractions?

• Divide the denominators

• Add the numerators

• Multiply the numerators

• Find a common denominator

Solve and simplify if needed:

1/3 - 1/5 =

Mathematical Equivalence

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What is the difference of the given problem?

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Why is it important to understand how to add and subtract fractions?

• To solve mathematical problems

• To confuse your classmates

• To impress your friends

• To win a math competition

What are the steps for subtracting fractions with a common denominator?

• Find a common numerator, subtract the denominators, simplify if necessary

• Find a common numerator, add the denominators, simplify if necessary

• Find a common denominator, subtract the numerators, simplify if necessary

• Find a common denominator, add the numerators, simplify if necessary

What is the first step for adding or subtracting fractions?

• Add or subtract the numerators

• Ensure the fractions have the same denominator

• Simplify the resulting fraction

• Find a common denominator

What should be done after finding a common denominator?

• Multiply the denominators

• Add or subtract the numerators

• Multiply the numerators

• Divide the denominators