Story Problems

Story Problems

Applying Multiplication and Division to real world situations

Introduction - Steps to Solving Word Problems

• Read the problem carefully, and look for words indicating math operations of adding, subtracting, multiplying and dividing

• Decide if the values in the problem represent positive values or negative values

Other things to remember

• Problems that involve repeated addition (doing something multiple times) are multiplication problems

• The words "per" and "for each" usually indicate a division problem

• Drawing a picture/a visual will almost always help you when solving story problems

Multiple Choice

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

How many withdrawals did he make?

• three

• two

Multiple Choice

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

How much did he take out on each withdrawal?

• $3

• $2

Multiple Choice

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

What operation should you use to solve this problem?

• Addition

• Subtraction

• Multiplication

• Division

Multiple Choice

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

Will the change be positive or negative?

• Positive

• Negative

Open Ended

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

Write an expression that would help you solve this problem.

Henry made three withdrawals of $2 each from his savings account. What was the change in his balance?

Taking money out (withdrawal) is a negative change.

He completed this change 3 times

He took out $2 each time

An equation you can use to solve this is -3(2) = -6

Open Ended

You try! Write the equation and solution for the following problem:

Flora made seven withdrawals of $75 each from her bank account. What was the overall change in her account?

Flora made seven withdrawals of $75 each from her bank account. What was the overall change in her account?

Taking money out (withdrawal) is a negative change.

She completed this change 7 times

He took out $75 each time

An equation you can use to solve this is -7(75) = -525

Time-out

Look at your paper and solve problems 1-4

Open Ended

Let's do some more!

The Question: Clark made four of his truck payments late and was fined four late fees. The total change to his savings from the late fees was (-$40)

First, how many truck payments were late?

Open Ended

Clark made four of his truck payments late and was fined four late fees. The total change to his savings from the late fees was (-$40)

How much was one late fee?

What was the total change?

Multiple Choice

Clark made four of his truck payments late and was fined four late fees. The total change to his savings from the late fees was (-$40)

• Addition

• Subtraction

• Multiplication

• Division

Open Ended

Clark made four of his truck payments late and was fined four late fees. The total change to his savings from the late fees was (-$40)

Write an equation you could use to find out how much one late fee cost. Include the solution in the equation.

Clark made four of his truck payments late and was fined four late fees. The total change to his savings from the late fees was (-$40)

He made 4 truck payments late
The total amount he was charged was -$40

An equation you can use to solve this is...

 $-40\div4=-10$  

All done

Look at your paper and solve problems 5-8