# Teaching 3.OA.A.3 – Multiplication & Division within 100 to Solve Word Problems in Situations Involving Equal groups, Arrays, & Measurement Quantities

# Operations & Algebraic Thinking – 3rd Grade

**Represent and solve problems involving multiplication and division**.

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.

**Teacher Notes**

Drawings and equations help us solve word problems in situations involving equal groups, arrays, and measurement quantities.

Understanding the context and actions of a story problem helps us to interpret and represent mathematical equations.

**Student Knowledge Goals**

I can tell what the numbers in a word problem represent.

I know how multiplication and division are related.

I know strategies for solving multiplication and division situations.

I understand the structure of multiplication and division situations to provide a context for the problem.

I can use the structure of a word problem to help me solve it.

**Vocabulary**

multiplication

array

equal groups/shares

factors

products

division equation

division

sharing

divisor

quotient

unknown/symbol

**Lessons**

Engage NY Module 1 B-4 – Understand the meaning of the unknown as the size of the group in division.

Engage NY Module 1 B-5 – Understand the meaning of the unknown as the number of groups in division.

Engage NY Module 1 B-6 – Interpret the unknown in division using the array model.

Learn Zillion Lesson – Relate multiplication and division to the array model using equal groups.

**Student Video Lessons**

Learn Zillion – Interpreting whole-number quotients of whole numbers

Virtual Nerd - Interpret whole-number quotients of whole numbers

Study Jams – Relate multiplication and division

**Online Problems and Assessments**

Khan Academy – Questions and Video Lessons

Division word problems - facts to 10

Complete the division table

**Online Games**

Represent and solve problems involving multiplication and division

**Printables**

Represent and solve problems involving multiplication and division

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Performance Task 1

Performance Task 2