Cross Reducing the Fraction Multiplication

What is the name of the strategy we use to solve this question?

• Reducing

• Cross Multiplication

When you multiply fractions you

• see if you can cross cancel and then multiply the numerators and multiply the denominators

• keep change flip then multiply the numerators and multiply the denominators

• find common numerators

• add the numerator to the denominator

Tags

CCSS.5.NF.B.6

When you cross cancel you

• see if the numerator of each fraction has a common factor with the denominator of the other fraction ex. 1/2 * 2/3 the 2's can be reduced to 1 before multiplying

• find common denominators

• find common numerators

• find the answer that has a lot of words and an example with numbers because that is it 3/4*5/6 is a fraction multiplication problem so have a good day

Tags

CCSS.5.NF.B.6

Tags

CCSS.5.NF.B.6

Tags

CCSS.5.NF.B.6

Cross cancel/reduce the fractions, if possible.

Tags

CCSS.5.NF.B.6

Multiply ⁵/₇ x ²¹/₃₀ x ⁶/₁₅ (reduce if needed)

• ²⁰/₁₀₅

• ¹/₅

• ⁹⁰/₄₆₀

• ³/₁₀

Tags

CCSS.5.NF.B.6

Tags

CCSS.5.NF.B.6

What is the GCF of these two numbers you would use to cross simplify?

• None

• 2

• 4

• 16

Multiply: Make sure to reduce if you can
2/7 x 2/3

• 3/7

• 6/14

• 5/14

• 5/9

Tags

CCSS.5.NF.B.6