Subtracting Fractions with Unlike Denominators Using Fraction Bars

This video tutorial teaches how to subtract fractions with unlike denominators using fraction bars. It covers the concept of equivalent fractions and common denominators, providing examples to illustrate the process. The tutorial addresses common misunderstandings and demonstrates how to correctly subtract fractions by finding a common denominator. It concludes with a final example to reinforce the learning objectives.

What is necessary for subtracting fractions with unlike denominators?

• The fractions must be whole numbers.

• The fractions must be improper.

• The fractions must have the same denominator.

• The fractions must have the same numerator.

When one denominator is a divisor of the other, what is the first step in subtracting the fractions?

• Change both fractions to improper fractions.

• Find a common numerator.

• Change only one fraction to have a common denominator.

• Multiply both fractions by 10.

In the example of 1/2 minus 1/8, what is the equivalent fraction of 1/2 used?

• 5/8

• 4/8

• 3/8

• 2/8

What is the first step when subtracting fractions with unrelated denominators?

• Add the numerators.

• Convert fractions to decimals.

• Multiply the fractions by 2.

• Look at the denominator of the other fraction.

In the example of 1/2 minus 1/3, what is the equivalent fraction of 1/2 used?

• 2/6

• 4/6

• 5/6

• 3/6

What is the correct result of 2/5 minus 1/3 according to Trevan?

• 1/15

• 1/3

• 1/2

• 1/5

Why was Trevan's answer of 1/15 correct for 2/5 minus 1/3?

• Because 2/5 is greater than 1/3.

• Because both fractions were improper.

• Because 1/3 is a multiple of 2/5.

• Because the denominators were unrelated and required equivalent fractions.