3A - Rational Word Problems

3A - Rational Word Problems

Multiplying & Dividing Word Problems

Key Words

When trying to figure out what operation to use in a word problem, it helps to be able to pick out some key words to help you.

Before we actually solve some word problems, we will be taking a look at what words in the problem tell us what operation to use.

Poll

A 14 gallon gasoline tank is 3/4 full. How many gallons of gas are in the tank?

What operation would you use to solve this problem? 

• Multiplication

• Division

Multiple Choice

Now you will try to solve the previous word problem.

If a 14 gallon gasoline tank is 3/4 full, how many gallons of gas are in the tank?

•  $3\ \frac{1}{2}$ 

•  $9\ \frac{1}{4}$ 

•  $10\ \frac{1}{2}$  

•  $4\ \frac{3}{4}$  

Poll

Mary spends (-$37.50) every time she fills her car up with gas. Over the past month, she spent a total of (-$262.50). How many times did she fill her car up with gas?

Which operation would you use to solve this problem?

• Multiply

• Divide

Multiple Choice

Now it's your turn to solve the previous problem.

Mary spends (-$37.50) every time she fills her car up with gas. Over the past month, she spent a total of (-$262.50). How many times did she fill her car up with gas?

• 9

• 7

• 10

• 8

Poll

The hour hand of a clock moves (-30) degrees every hour. 

How many degrees does it move in

 $2\ \frac{1}{5}$  hours? 

Would you multiply or divide to solve this problem?

• Multiply

• Divide

Multiple Choice

Now solve the previous problem.

The hour hand of a clock moves (-30) degrees every hour. How many degrees does it move in

 $2\ \frac{1}{5}$   hours? 

• 66 degrees

• -66 degrees

• 52 degrees

• -52 degrees

Poll

How many 0.75 pound packages can you make with 6 pounds of sunflower seeds?

What operation would you use to sove this problem?

• Multiply

• Divide

Multiple Choice

Now solve the previous problem.

How many 0.75 pound packages can you make with 6 pounds of sunflower seeds?

• 8 packages

• 4.5 packages

• 5 packages

• 1 package

Poll

You lose 5 points for every wrong answer in a trivia game. If you start with 0 points and answer 8 questions in a row wrong, how many points do you have now?

What operation would you use to solve this problem?

• Multiply

• Divide

Multiple Choice

Now try to solve the problem.

You lose 5 points for every wrong answer in a trivia game. If you start with 0 points and answer 8 questions in a row wrong, how many points do you have now?

• 40

• -40

• 8

• -8