Subtracting Mixed Numbers and Common Denominators

In this video, the teacher explains how to subtract mixed numbers using two examples. The first example involves subtracting 7 4/5 and 3 1/3, while the second example demonstrates subtracting 3 3/4 and 1 1/2 using the vertical method. The video concludes with a challenge problem for viewers to solve on their own.

What is a mixed number?

• A combination of a whole number and a fraction

• A number with a decimal

• A number with only a fraction

• A number with only a whole number

What is the first step in subtracting mixed numbers?

• Subtract the whole numbers first

• Find the least common denominator

• Add the fractions

• Convert fractions to decimals

What is the least common denominator of 5 and 3?

• 15

• 10

• 5

• 20

After finding the least common denominator, what is the next step?

• Convert to improper fractions

• Add the fractions

• Multiply the numerators by the same factor as the denominators

• Subtract the whole numbers

What is the result of subtracting 7 and 4/5 from 3 and 1/3?

• 4 and 7/15

• 3 and 2/15

• 3 and 1/3

• 4 and 1/5

What is the least common denominator of 4 and 2?

• 6

• 8

• 4

• 2

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

• 2 and 1/4

• 2 and 1/2

• 1 and 1/4

• 1 and 1/2

What is the final step in subtracting mixed numbers?

• Add the whole numbers

• Subtract the fractions

• Multiply the fractions

• Divide the fractions

What should you do if the denominators are already the same?

• Convert to improper fractions

• Add the fractions

• Find a new common denominator

• Subtract the fractions directly

What is the challenge problem given at the end of the video?

• Subtract 4 and 3/8 from 2 and 1/5

• Subtract 3 and 1/2 from 1 and 1/4

• Subtract 5 and 2/3 from 3 and 1/6

• Subtract 6 and 1/4 from 2 and 3/8