Using Equivalent Fractions to Subtract Fractions and Mixed Numbers with Unlike Denominators

This video tutorial teaches how to subtract fractions and mixed numbers with unlike denominators using number lines. It reviews subtracting like fractions, highlights common mistakes, and demonstrates subtracting specific fractions by finding common denominators and using equivalent fractions. The lesson emphasizes the importance of renaming fractions to have common units before performing subtraction.

What is the first step in subtracting fractions with unlike denominators?

• Subtract the numerators directly

• Find a common denominator

• Multiply the fractions

• Add the fractions

When subtracting like fractions, what do you do with the denominators?

• Subtract them

• Multiply them

• Add them together

• Keep them the same

What is a common mistake students make when subtracting fractions with different denominators?

• Subtracting only the numerators

• Subtracting both numerators and denominators

• Adding the fractions

• Multiplying the fractions

How do you find a common denominator for two fractions?

• Subtract the denominators

• Divide each interval by the other fraction's denominator

• Multiply the denominators

• Add the numerators

What is the equivalent fraction of 1/2 when the common denominator is 10?

• 10/10

• 1/10

• 2/10

• 5/10

In the example of 1 and 1/5 minus 1/2, what is the result after finding a common denominator?

• 5/10

• 7/10

• 3/10

• 9/10

How do you adjust the number line for 1 and 1/2 minus 3/4 to have a common denominator?

• Add one more tick mark to each half

• Subtract one tick mark from each half

• Multiply the number line by 2

• Divide the number line by 2