Multiplying and Dividing Rational Numbers

Multiplying and Dividing Rational Numbers

Multiple Choice

2 X 10 =

• 12

• 20

• 5

Multiple Choice

7 X 8 =

• 56

• 65

• 45

Multiplying and Dividing Rational Numbers

Rules for Multiplying Rational Numbers

• Positive x Positive= Positive

• Negative x Negative= Positive

• Negative x Positive = Negative

Multiple Choice

When multiplying two numbers with different signs, the answer will be ________.
(example: N x P or P x N)

• negative
• the sign of the bigger value
• positive
• the sign of the higher number

Multiple Choice

When multiplying two numbers with the same signs, the sign of your answer will be...
(example: N x N or P x P)

• negative
• the sign of the bigger value
• the sign of the higher number
• positive

Multiple Choice

A negative divided by a positive is a ________

• positive
• negative

Put it all together

Multiple Choice

(-9)(-8)

• -72
• 72

Multiple Choice

(-5)(-12)

• -60
• 60

Multiple Choice

4(-20)

• 80
• -80
• 24
• -24

Multiple Choice

(-9)(-8)

• -72
• 72
• 81
• -81

Multiple Choice

Multiply. Make sure your final answer is in simplest form. 

• -7/8
• 7/8
• -63/72
• 63/72

Multiple Choice

Evaluate and simplify (reduce):

 $\frac{2}{3}\cdot\frac{1}{8}=$  

• 12

•  $\frac{16}{3}$  

•  $\frac{2}{24}$  

•  $\frac{1}{12}$  

Multiple Choice

Determine the product: -2.14 x (5.8) =

• -12.412

• 10.45

• 12.412

• -10.45

Multiple Choice

A recipe for cake requires 1/3 cup of milk. Molly wants to make 4/5 of the recipe. How many cups of milk should Molly use to make the cake?

• 4/15

• 5/12

• 1/5

• 6/8

Multiple Choice

Multiply. Make sure your final answer is in simplest form. 

• -7/8
• 7/8
• -63/72
• 63/72