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- 3.NBT.A.1Use place value understanding to round whole numbers to the nearest 10 or 100.
- 3.NBT.A.2Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
- 3.NBT.A.3Multiply one-digit whole numbers by multiples of 10 in the range 10â90 (e.g., 9 Ã 80, 5 Ã 60) using strategies based on place value and properties of operations.

The Video Game Model of Adding

3rd Grade Math

Â» Unit:

Multiplication

Big Idea:Video games often dole out points in groups of 25, 50 and 100 because they are easy numbers to multiply. Practice with patterns of 5 and 10 apply directly to understanding patterns with 50 and 100.

The Multiplication and Division Connection

3rd Grade Math

Â» Unit:

Sharing Equally with Division

Big Idea:Students can solve multiplication and division problems quickly by recognizing the relationship between the two operations.

Big Groups and Big Products

3rd Grade Math

Â» Unit:

2-Digit by 1-Digit Multiplication

Big Idea:Big groups and big products can be broken apart into smaller groups of tens and ones to make it easier to multiply and find the product

Tell Me A 2 by 1 Digit Multiplication Story (Lesson 1 of 2)

3rd Grade Math

Â» Unit:

2-Digit by 1-Digit Multiplication

Big Idea:Students use two numbers to create a multiplication word problem, demonstrating the solution using a visual model matching their strategy choice (equal groups, arrays or repeated addition).

Tell Me a 2 by 1 Digit Multiplication Story (Lesson 2 of 2)

3rd Grade Math

Â» Unit:

2-Digit by 1-Digit Multiplication

Big Idea:Students use two numbers to create a multiplication word problem, demonstrating the solution using a visual model matching their strategy choice (equal groups, arrays or repeated addition).

Fundraiser Finance (Pickles for a Profit)

3rd Grade Math

Â» Unit:

Solving Mult-Step Word Problems Using the Four Operations

Big Idea:Engaging students in analyzing the cost-benefit of selling different food items at a fundraiser provides real-world, two-step word problems!

Using Mental Math to Multiply 2-Digit Numbers (Are You My Match?)

4th Grade Math

Â» Unit:

Multiplying and Dividing

Big Idea:Basic facts and place-value patterns can be used to mentally multiply a two-digit number by a power of 10.

Plan A Party! (Day 1)

3rd Grade Math

Â» Unit:

Math in the Real World

Big Idea:Math in context makes much more sense

Plan a Party! (Day 2)

3rd Grade Math

Â» Unit:

Math in the Real World

Big Idea:Math in context makes much more sense.

3.NBT.A.1

Use place value understanding to round whole numbers to the nearest 10 or 100.

3.NBT.A.2

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

3.NBT.A.3

Multiply one-digit whole numbers by multiples of 10 in the range 10â90 (e.g., 9 Ã 80, 5 Ã 60) using strategies based on place value and properties of operations.