Multiplying Fraction Rules

Which of the following statements summarizes multiplying fractions?

• Multiply the Tops and Multiply the Bottoms.

• Cross Simplify

• Find a common denominator, then multiply

• Multiply the numerators and keep the common denominator

When multiplying a fraction times a whole number, how do you convert the whole number to a fraction?  For Example:

• put the 4 in front of the 3/5

• change the 4 to a common denominator

When multiplying fractions, you must always have common denominators.

• True

• False

• multiply the whole numbers times each other (5x4)

• add the whole numbers (5+4)

• Find common denominators

• 8/27

• 6/12

• 36/6

• 20/12

• 3/5

• 16/15

• 15/16

What is ³/₅ of ¹²/₁₅?

• ¹²/₂₅

• ¹²/₂₀

• ³⁶/₂₅

• ³⁶/₇₅

Solve. Hint: Change the fraction to a decimal first.

Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Hint: leave them as fractions and multiply.

Solve. Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Solve. Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative