2 step word problems multiplication

Objective:
I can represent and solve a two-step problem involving
multiplication and addition.

Guiding Question:
How can I represent a two-step problem involving addition
and multiplication?

Let’s Explore

Created by HISD Curriculum using Google® Slides

Sierra has 10 boxes of

pencils . Each box contains 4

pencils. How many pencils

does Sierra have?

Sierra has 10 pencils. She

orders 4 more pencils from a
website. How many pencils

does Sierra have now?

Collaborate with someone in your group to write an expression
that represents each math story.

Drag and Drop

Sierra has 10 boxes of Match the following pencils. Each box contains 4 pencils. How many pencils does Sierra have?​ ​ ​ ​

Placeholder

Sierra has 10 pencils. She orders 4 more pencils from a website. How many pencils does Sierra have now?​

Placeholder

Drag these tiles and drop them in the correct blank above

10 x 4

10 - 4

10 / 4

10 + 4

Let’s Explore

Created by HISD Curriculum using Google® Slides

Sierra has 10 boxes of

pencils . Each box contains 4

pencils. How many pencils

does Sierra have?

Sierra has 10 pencils. She

orders 4 more pencils from a
website. How many pencils

does Sierra have now?

Look below to see if you have the correct solution.

Solution: 10 x 4

Solution: 10 + 4

Sierra has 10 boxes of pencils. Each box contains 4 pencils. How many pencils does
Sierra have?

10 x 4

How can we represent this expression?

Draw

Sierra has 10 boxes of pencils. Each box contains 4 pencils. How many pencils does Sierra have?

Represent this problem using a strip diagram.

Let’s Explore

Let’s solve your word story problems using the strip diagram
strategy.

Sierra has 10 boxes of pencils. Each box contains 4 pencils. How many pencils does
Sierra have?

10 x 4

Total Number of Pencils

?

40 pencils: In this model for 10 x 4 we use repeated addition, or multiplication to find the product

40.

4

4

4

4

4

4

4

4

4

4

Sierra has 10 pencils. Some one gives her 4 more pencils.
How many pencils does Sierra have now

10 + 4

How can we represent this expression?

Draw

Sierra has 10 pencils. Some one gives her 4 more pencils.
How many pencils does Sierra have now

Represent this problem using a strip diagram.

Let’s Explore

Let’s solve your word story problems using the strip diagram
strategy.

Sierra has 10 pencils. Some one gives her 4 more pencils.
How many pencils does Sierra have now

10 + 4

Total Number of Pencils?

14 pencils: In the model for 10 +4, we can add 10 and 4 to find the sum of 14.

10

4

Let’s Apply what we know

Let’s try to find the solution to this math story.

Sierra has 10 boxes of candy bars. There are 4 candy bars in each box.
She bought 12 candy canes from the store. How many pieces of candy does Sierra have now?

Success Criteria
1. Read and Annotate the problem.
2. Draw a Model to represent the problem
3. Create an Equation to solve the problem.
4. Write a statement to answer the question.

Let’s Review
Let’s try to find the solution to this math story. Sierra has 10 boxes of candy
bars. There are 4 candy bars in each box. She bought 12 candy canes from the
store. How many pieces of candy does Sierra have now?

What expression can be used to solve the problem: 10 x 4 + 12

How can we represent this two - step problem using a strip diagram?

Total Amount of Candy ?

Created by HISD Curriculum using Google® Slides

4

4

4

4

4

4

4

4

4

4

12

40 candy bars

12 candy canes

Let’s Review

Continued…
Total Amount of Candy ?

Created by HISD Curriculum using Google® Slides

4

4

4

4

4

4

4

4

4

4

12

40 candy bars
12 candy canes

●We can add the product of 10 and 4 to 12.

●The sum of 40 and 12 is 62.

●40 + 12 = 62

●Sierra has 62 candies

Let’s Practice:

Created by HISD Curriculum using Google® Slides

Complete the following problem.

Michael practiced for his recital 3
hours a week for 4 weeks. He also
practiced 5 hours before his recital.
How many hours did Michael
practice?

Draw a strip diagram model to represent
the problem.

Write an expression to represent the
problem.

Solve the problem.

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