Fraction Operations and Simplification

The video tutorial covers subtracting fractions, emphasizing the need for a common denominator. It provides two examples: one with a common denominator and another requiring the least common denominator. The tutorial explains converting subtraction to addition and simplifying results using prime factorization. The lesson concludes with a preview of future topics.

Why is it necessary to have a common denominator when subtracting fractions?

• To make the numerators equal

• To ensure the fractions are comparable

• To simplify the fractions

• To change the fractions to decimals

Tags

CCSS.7.NS.A.1C

In the first example, what operation is performed to change the subtraction into addition?

• Changing the sign of the second fraction

• Dividing the fractions

• Adding the numerators

• Multiplying the fractions

Tags

CCSS.7.NS.A.1C

What is the simplified result of the first example?

• -1/4

• -1/2

• -3/8

• -5/8

In the second example, what is the least common denominator of 2 and 10?

• 5

• 20

• 10

• 15

Tags

CCSS.7.NS.A.1C

How is the negative sign handled in the second example before finding the common denominator?

• It is moved to the denominator

• It is moved to the numerator

• It is changed to positive

• It is ignored

Tags

CCSS.7.NS.A.1C

What is the result of adding the numerators in the second example?

• -8

• -2

• -10

• -5

Tags

CCSS.7.NS.A.1C

What is the prime factorization of 8 used in the simplification process?

• 2 * 3

• 2 * 4

• 3 * 3

• 2 * 2 * 2

What common factor is used to simplify the result in the second example?

• 4

• 2

• 5

• 3

Tags

CCSS.7.NS.A.1C

What is the simplified result of the second example?

• 3/5

• 2/5

• 4/5

• 1/5

Tags

CCSS.5.NF.B.6

What will the next video focus on?

• Dividing fractions

• Multiplying fractions

• More examples and using prime factorization

• Adding fractions

Tags

CCSS.5.NF.B.6