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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.

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 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 Explore

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

Sierra has 10 boxes of pencils. She orders 4 more pencils from a website. 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 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

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

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.

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?