Subtracting Mixed Numbers and Improper Fractions

This video tutorial compares two methods for subtracting mixed numbers: using improper fractions and using mixed numbers directly. It demonstrates each method step-by-step, including converting mixed numbers to improper fractions, finding a common denominator, and performing subtraction. The video also uses fraction bars to visually model the subtraction process, ensuring a clear understanding of the concepts.

What are the two methods discussed in the video for subtracting mixed numbers?

• Using mixed numbers and using percentages

• Using decimals and using percentages

• Using improper fractions and using mixed numbers

• Using improper fractions and using decimals

Tags

CCSS.7.NS.A.1C

What is the first step in the method using improper fractions?

• Subtracting the whole numbers

• Converting mixed numbers to improper fractions

• Simplifying the fractions

• Finding a common denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why is it important to find a common denominator when using improper fractions?

• To simplify the fractions

• To ensure all pieces are the same size for subtraction

• To make the fractions easier to read

• To convert fractions to decimals

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

After finding a common denominator, what is the next step in the first method?

• Add the fractions

• Convert back to mixed numbers

• Subtract the numerators

• Multiply the fractions

How do you convert an improper fraction back to a mixed number?

• By subtracting the denominator from the numerator

• By multiplying the numerator by the denominator

• By dividing the numerator by the denominator

• By adding the numerators

Tags

CCSS.7.NS.A.1C

What is the first step in the method using mixed numbers?

• Converting to improper fractions

• Subtracting the whole numbers

• Performing an exchange

• Finding a common denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why might you need to perform an exchange when using mixed numbers?

• To simplify the fractions

• To facilitate subtraction when the first fraction is smaller

• To ensure the fractions have the same denominator

• To convert fractions to decimals

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What does the exchange process involve in the second method?

• Changing the denominator

• Adding fractions

• Converting a whole number to fractions

• Multiplying fractions

Tags

CCSS.7.NS.A.1C

What is the final step in both methods to verify the result?

• Converting to decimals

• Re-adding the fractions

• Checking with a model

• Using a calculator

Tags

CCSS.7.NS.A.1C

What is the result of subtracting 1 and 3/4 from 3 and 1/2 using either method?

• 1 and 3/4

• 1 and 1/4

• 2 and 1/4

• 2 and 3/4

Tags

CCSS.7.NS.A.1C