Mastering Multiplication and Division of Fractions

This video tutorial covers the multiplication and division of fractions. It begins with an introduction to the topic, emphasizing the importance of converting mixed numbers to improper fractions before multiplying. The tutorial explains the process of multiplying fractions by multiplying the numerators and denominators, followed by simplifying the result. It then introduces the concept of dividing fractions using the Keep Change Flip method, which involves keeping the first fraction, changing the division sign to multiplication, and flipping the second fraction. The video concludes with instructions for practice and a mastery check.

Do fractions need a common denominator to be multiplied?

• No, never

• Yes, always

• Only if they are mixed numbers

• Only if they are improper fractions

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How do you convert a mixed number into an improper fraction for multiplication?

• No conversion is needed

• By adding the numerator to the denominator

• By flipping the fraction

• By using the 'round the world' method

What is the first step in multiplying fractions?

• Simplify the fractions

• Multiply the denominators

• Multiply the numerators

• Convert to mixed numbers

Tags

CCSS.5.NF.B.6

How do you simplify a fraction after multiplication?

• By converting it to a mixed number

• By dividing both by their greatest common divisor

• By adding the numerator and denominator

• No simplification is needed

Tags

CCSS.5.NF.B.6

What indicates that a fraction like 10/35 can be simplified?

• The denominator is a multiple of 10

• The numerator is larger than the denominator

• Both numbers end in 0 or 5

• Both numbers are even

What is the 'Keep, Change, Flip' method used for?

• Subtracting fractions

• Multiplying fractions

• Dividing fractions

• Adding fractions

Tags

CCSS.6.NS.A.1

After applying 'Keep, Change, Flip', what is the next step?

• Add the fractions

• Convert to mixed numbers

• Multiply the fractions

• Simplify the fractions

Tags

CCSS.7.NS.A.2C

In the 'Keep, Change, Flip' method, what do you change the operation to?

• No change is made

• Multiplication

• Subtraction

• Addition

Tags

CCSS.7.NS.A.2C

How do you simplify the fraction 10/12?

• 1/2

• 10/12 cannot be simplified

• 2/3

• 5/6

What do you do if the result of a division is an improper fraction?

• Change it back to division

• Leave it as is

• Flip it again

• Convert it to a mixed number