3.OA.B.6

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- 3.OA.B.5Apply properties of operations as strategies to multiply and divide.2 Examples: If 6 × 4 = 24 is known, then 4 × 6 = 24 is also known. (Commutative property of multiplication.) 3 × 5 × 2 can be found by 3 × 5 = 15, then 15 × 2 = 30, or by 5 × 2 = 10, then 3 × 10 = 30. (Associative property of multiplication.) Knowing that 8 × 5 = 40 and 8 × 2 = 16, one can find 8 × 7 as 8 × (5 + 2) = (8 × 5) + (8 × 2) = 40 + 16 = 56. (Distributive property.)
- 3.OA.B.6Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.

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## 3.OA.B.6

## Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.

18 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
(14)

Resources
(12)

Reflections
(1)

### Using Journaling to Create Lessons

3rd Grade Math »
Unit: Understanding Division

3rd Grade Math »
Unit: Understanding Division

### Designs with Nines: Patterns in Multiplication and Division (Day 2)

3rd Grade Math »
Unit: Introduction to Basic Division

3rd Grade Math »
Unit: Introduction to Basic Division

### Math with Maples

3rd Grade Math »
Unit: Division in Context

3rd Grade Math »
Unit: Division in Context

### Drawing Equal Group Models

3rd Grade Math »
Unit: Introduction to Basic Division

3rd Grade Math »
Unit: Introduction to Basic Division

Big Idea:

#### The equal groups model used in multiplication can be used to solve division problems as well!

Standards:

Favorites
(5)

Resources
(16)

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
(14)

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

### Using the Multiplication and Division Relationship to Solve

3rd Grade Math »
Unit: Sharing Equally with Division

3rd Grade Math »
Unit: Sharing Equally with Division

### Grouping or Sharing?

3rd Grade Math »
Unit: Understanding Division

3rd Grade Math »
Unit: Understanding Division

### Division by Sharing Vs. Grouping (Day 2)

3rd Grade Math »
Unit: Understanding Division

3rd Grade Math »
Unit: Understanding Division

### 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
(2)

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

### Testing Trail Mix

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

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

### Building Our Problem Solving Tools

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

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

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