3.OA.A.4

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- 3.OA.A.1Interpret 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.2Interpret 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.3Use 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.
- 3.OA.A.4Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = _ ÷ 3, 6 × 6 = ?

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## 3.OA.A.4

## Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = _ ÷ 3, 6 × 6 = ?

11 Lesson(s)

### Exploring the Idea of Division

3rd Grade Math »
Unit: Introduction to Basic Division

3rd Grade Math »
Unit: Introduction to Basic Division

Big Idea:

#### The cognitive dissonance experienced when encountering novel, out of level division problems will lead to more deeply internalized understanding of the basic concepts of division to be mastered at the 3rd grade level.

Favorites
(16)

Resources
(12)

Reflections
(1)

### Quotients - Just the Basics

3rd Grade Math »
Unit: Introduction to Basic Division

3rd Grade Math »
Unit: Introduction to Basic Division

Big Idea:

#### Just like multiplication, addition, and subtraction, division problems involve patterns and there are methodical ways in which manipulatives can be used to solve division problems with small dividends and divisors of 1 through 10.

Favorites
(18)

Resources
(18)

Reflections
(1)

### The Multiplication and Division Connection

3rd Grade Math »
Unit: Sharing Equally with Division

3rd Grade Math »
Unit: Sharing Equally with Division

### Multiply and Divide by 10

3rd Grade Math »
Unit: Fluency to Automoticity

3rd Grade Math »
Unit: Fluency to Automoticity

Big Idea:

#### Counting by 10's is easy for students of this age. Knowing that base 10 can be used to help multiply and divide in the higher numbers by decomposing is critical. This lesson sets the base for future work.

Favorites
(4)

Resources
(12)

Reflections
(1)

### Using the Multiplication and Division Relationship to Solve

3rd Grade Math »
Unit: Sharing Equally with Division

3rd Grade Math »
Unit: Sharing Equally with Division

### Humans vs Narwhals

3rd Grade Math »
Unit: Math and Me: Nutrition, Health and More

3rd Grade Math »
Unit: Math and Me: Nutrition, Health and More

### The Multiplication - Division Relationship

3rd Grade Math »
Unit: Understanding Division

3rd Grade Math »
Unit: Understanding Division

Big Idea:

#### Critical Area 1 for third grade states that students must use a variety of solution strategies in order to learn the relationship between multiplication and division. This lesson takes the students through several strategies.

Favorites
(4)

Resources
(15)

Reflections
(1)

### Navigating Road Blocks in Problem Solving

3rd Grade Math »
Unit: Multiply or Divide with Word Problems

3rd Grade Math »
Unit: Multiply or Divide with Word Problems

### Explaining Thinking in a Journal

3rd Grade Math »
Unit: Understanding Division

3rd Grade Math »
Unit: Understanding Division

### Designs with Nines: Patterns in Multiplication and Division (Day 1)

3rd Grade Math »
Unit: Introduction to Basic Division

3rd Grade Math »
Unit: Introduction to Basic Division

### Finding What's Missing

3rd Grade Math »
Unit: Multiply or Divide with Word Problems

3rd Grade Math »
Unit: Multiply or Divide with Word Problems

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