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# Multiplication and Division, Part 1

## Objective

Solve one-step word problems involving multiplication and division and write problem contexts to match expressions and equations.

## Common Core Standards

### Core Standards

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• 3.OA.A.1 — Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.

• 3.OA.A.2 — Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8.

• 3.OA.A.3 — Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

## Criteria for Success

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1. Solve one-step word problems involving multiplication or division with units of 2, 3, 4, 5, and 10, using a tape diagram to represent the problem if necessary (MP.4).
2. Write a word problem that can be solved with a given multiplication or division expression or equation (MP.2).

## Tips for Teachers

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#### Remote Learning Guidance

If you need to adapt or shorten this lesson for remote learning, we suggest prioritizing Anchor Task 1 (benefits from worked example) and Anchor Task 2 (can be done independently . Find more guidance on adapting our math curriculum for remote learning here.

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### Problem 1

Many problems can be solved in different ways. For each of the following problems,

• Decide if the following word problems can be solved using multiplication or division. Explain your thinking.
• Represent each problem using an equation with a letter standing for the unknown quantity.
• Solve each problem.

a. Liam is cooking potatoes. The recipe says you need 7 minutes for every pound of potatoes you are cooking. How many minutes will it take for Liam to cook 10 pounds of potatoes?

#### References

EngageNY Mathematics Grade 3 Mathematics > Module 1 > Topic D > Lesson 13Problem Set, Question #5

Grade 3 Mathematics > Module 1 > Topic D > Lesson 13 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 Fishtank Learning, Inc.