Multiplying and Dividing Positive and Negative Fractions

To multiply two fractions...

• multiply the numerators and keep the denominators the same

• multiply the numerators and multiply the denominators.

• keep the numerators the same and multiply the denominators.

• guess and check.

When dividing two fractions, you first have to

• make one fraction negative

• multiply them together

• change division to multiplication and then flip the second fraction

• flip the first fraction and multiply

When multiplying or dividing two numbers with different signs (neg x pos) ...your answer will be....?

• Negative

• Zero

• Positive

• No Sign

Solve the problem , DO NOT use LCF, simplify

• -2/6

• -1/3

• -3

• 1/3

Change to improper fractions then multiply

• -24/12

• -66/78

• -143/36

Use LCF , then Multiply

• -5/18

• -15/6

• -1/3

Just Multiply and Simplify

• -3/16

• 3/16

The two rules for multiplying and dividing negative fractions are: choose two answers

• Same Signs the answer is Positive

• Same signs the answer is Negative

• Different Signs the answer is Negative

• Different Signs the answer is Positive

When DIVIDING FRACTIONS ...

• Add the fractions.

• Get a common denominator.

• Keep the 1st fraction, Change to multiplication, and Flip the 2nd fraction to its reciprocal.

• Subtract the fractions.

When multiplying fractions, what do you do?

• Keep Change Flip

• Find the least common denominator

• Multiply all of the numbers together

• Multiply straight across. Top x Top and Bottom x Bottom.