Multiplication and Division, Part 1

Lesson 16

Objective

Solve two-step word problems involving all four operations and assess the reasonableness of answers.

Materials and Resources

Common Core Standards

Core Standards

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  • 3.OA.D.8 — Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. This standard is limited to problems posed with whole numbers and having whole-number answers; students should know how to perform operations in the conventional order when there are no parentheses to specify a particular order (Order of Operations).

Foundational Standards

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  • 3.NBT.A.2

Criteria for Success

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  1. Make sense of a three-act task and persevere in solving it (MP.1).
  2. Solve two-step word problems involving addition, subtraction, multiplication, and division (MP.4). 
  3. Assess the reasonableness of an answer (MP.1).

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Anchor Tasks

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Problem 1

Act 1: Watch the following video: Sugar Act 1.

How many sugar packets are there?

Guiding Questions

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References

Exit 10A Hey Look! I Made a 3-Act!

Hey Look! I Made a 3-Act! is made available by Joe Schwartz on Exit 10A. Accessed Oct. 10, 2018, 4:10 p.m..

Modified by The Match Foundation, Inc.

Problem 2

Act 2: Use the following information to solve:

Guiding Questions

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References

Exit 10A Hey Look! I Made a 3-Act!

Hey Look! I Made a 3-Act! is made available by Joe Schwartz on Exit 10A. Accessed Oct. 10, 2018, 4:10 p.m..

Modified by The Match Foundation, Inc.

Problem 3

Act 3: Reveal the answer: 

There are 110 packets of sweetener.

Guiding Questions

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References

Exit 10A Hey Look! I Made a 3-Act!

Hey Look! I Made a 3-Act! is made available by Joe Schwartz on Exit 10A. Accessed Oct. 10, 2018, 4:10 p.m..

Modified by The Match Foundation, Inc.

Problem 4

Act 4 (sequel): 

Ms. Ruizdeporras took 75 packets to put in Building B’s teacher room. Then, teachers in Building A used 5 packets of sweetener per day before it ran out. How many days did the sweetener last before it ran out?

Guiding Questions

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Discussion of Problem Set

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  • What made #3 a bit more difficult than the previous problems? What information did you use first to solve? Where did that information show up in the problem? 
  • What made #6 a bit more difficult than the previous problems? 
  • Did anyone attempt the challenge in #7? How did you approach solving?

Target Task

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Ms. Egeregor buys 27 books for her classroom library. She buys an equal number of fiction, nonfiction, and poetry books. She shelves all of the poetry books first. How many books does Ms. Egeregor have left to shelve? Show or explain your work.

References

EngageNY Mathematics Grade 3 Mathematics > Module 1 > Topic F > Lesson 21Exit Ticket

Grade 3 Mathematics > Module 1 > Topic F > Lesson 21 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..

Modified by The Match Foundation, Inc.

Mastery Response

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