2.4-2.5 multiplying and dividing rational numbers

​Multiplying & Dividing Rational Numbers

By Carly Rexing

Multiple Choice

Without multiplying, tell whether the value of the expression is positive or negative. (-7)(-8.2)

• Positive

• Negative

• Neither

• Both

Multiple Choice

Without multiplying, tell whether the value of the expression is positive or negative. (-157) · (2.3)

• Positive

• Negative

• Neither

• Both

Multiple Choice

Multiply. Write your answer in simplest form.

• 27/40
• -27/40
• 5/6
• -5/6

Multiple Choice

$$\frac{1}{5}\div\frac{-2}{5}$$  

• $$\frac{-1}{2}$$  

• $$\frac{2}{10}$$  

• $$\frac{1}{5}$$  

• $$\frac{5}{10}$$  

Multiple Choice

Divide. Write fractions in simplest form.

$$-1\frac{1}{6}\div\frac{2}{9}$$      

•      $$-5\frac{1}{4}$$  

•      $$-\frac{14}{54}$$  

•      $$-\frac{7}{27}$$  

•      $$-\frac{63}{12}$$   

Multiple Choice

(-0.6) x (2.4)

• 1.43

• -1.44

• -14.4

• 14.3

Multiple Choice

−2.943 ÷ 2.7

• 109

• 10.9

• 1.09

• −1.09

Multiple Choice

$$-\frac{1}{7}\ \cdot\ \ -7$$  =

• 1

• -1

• 1/49

• -1/49

Multiple Choice

$$\left(\frac{2}{3}\right)\times\left(\frac{1}{2}\right)\times\left(-\frac{3}{4}\right)$$  

• $$-\frac{2}{3}$$  

• $$\frac{1}{3}$$  

• $$-\frac{1}{4}$$  

• $$-\frac{1}{2}$$  

Multiple Choice

-10(2)(-3) =

• -60
• 60
• -50
• 50

Open Ended

Evaluate the expression. Write fractions in simplest form.

Open Ended

During a drought, a river’s height decreases by 0.35 inch every day. What is the change in the river’s height after 7 days?

Math Response

A particular stock, initially worth 16 points, loses 2.25 points every hour for 6 hours.

How many points is the stock worth at the end of 6 hours, written as a decimal?

Type answer here

Correct Answer: 2.5

Deg^°

Rad

​Evaluating Complex Fractions

Fill in the Blank

Evaluate and write your answer as a fraction in simplest form.

$$\frac{\frac{1}{2}+\ \frac{2}{3}}{2\ \frac{1}{3}+\frac{1}{5}}$$  

/

Multiple Choice

Solve the complex fraction.

• 49/30

• 5/6

• 30/49

• 6/5

Fill in the Blank

Evaluate and write your answer as a fraction in simplest form.

$$\frac{-\frac{2}{3}-8}{-5\ +\frac{3}{4}}$$  

Fill in the Blank

$$\frac{-1\frac{2}{3}\cdot\left(-\frac{3}{\left(5\right)}\right)}{\left(\frac{1}{3}\right)^2}$$

Multiple Choice

Roger filled a 12-cup coffee pot with water using a 1 and 1/3 cup bowl.

How many times did he fill the bowl?

• 3 times

• 4 times

• 9 times

• 10 times

Multiple Choice

Max and five friends went out to eat for lunch.

The total cost of the meal was $50.82.

If each person paid an equal amount, how much did Max pay?

• $8.47

• $304.92

• $44.82

• $10.16