Multiplying Fractions with GCF and LCM Techniques

What is the purpose of using the Greatest Common Factor (GCF) in fraction operations?

• To convert fractions to decimals

• To multiply fractions

• To simplify fractions

• To find the common denominator

Which video lesson is linked for learning about GCF?

• Video 1.1

• Video 2.1

• Video 3.1

• Video 4.1

What is the Least Common Multiple (LCM) used for in fraction operations?

• To convert fractions to decimals

• To simplify fractions

• To multiply fractions

• To add and subtract fractions

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What must be true about the denominators of fractions before you can add them?

• They must be prime numbers

• They must be even numbers

• They must be different

• They must be the same

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

How do you multiply two fractions?

• Add the numerators and denominators

• Multiply the numerators and add the denominators

• Multiply the numerators and denominators separately

• Divide the numerators and denominators separately

Tags

CCSS.5.NF.B.6

What is the GCF of 6 and 24?

• 24

• 6

• 3

• 12

What is the benefit of using cross-cancellation in fraction multiplication?

• It changes the denominators to the same value

• It makes the fractions larger

• It avoids the need to simplify the final product

• It converts fractions to decimals

Tags

CCSS.5.NF.B.6

When using cross-cancellation, what do you do with the GCF?

• Use it to cancel out common factors before multiplying

• Add it to the numerator

• Ignore it

• Subtract it from the denominator

Tags

CCSS.6.NS.B.4

What is the result of multiplying 9/10 by 5/9 using cross-cancellation?

• 5/10

• 1/1

• 1/2

• 9/45

How do you multiply a fraction by a whole number?

• Add the whole number to the numerator

• Convert the whole number to a fraction with 1 as the denominator and then multiply

• Multiply the numerator by the whole number and keep the denominator the same

• Multiply the whole number by the denominator

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C