2.NBT.B.6

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- 2.NBT.B.5Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
- 2.NBT.B.6Add up to four two-digit numbers using strategies based on place value and properties of operations.
- 2.NBT.B.7Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
- 2.NBT.B.8Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
- 2.NBT.B.9Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.)

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## 2.NBT.B.6

## Add up to four two-digit numbers using strategies based on place value and properties of operations.

34 Lesson(s)

### Domino Addition: Understanding the Part/Part/Whole Relationship

2nd Grade Math »
Unit: Addition and Subtraction Basic Training

2nd Grade Math »
Unit: Addition and Subtraction Basic Training

### Finding the Right Place!

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Identifying Tens and Ones

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Mentally Speaking!

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Applying The Basics!

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Abracadabra

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Introduction to Four Addends

2nd Grade Math »
Unit: Adding Four Addends

2nd Grade Math »
Unit: Adding Four Addends

### Tallying it Up

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Keep On Doing!

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### Manipulation Central

2nd Grade Math »
Unit: More Complex Numbers and Operations

2nd Grade Math »
Unit: More Complex Numbers and Operations

### What's in Your Zoo?

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

2nd Grade Math »
Unit: Numbers & Operation in Base Ten Grade 2

### 10, 20, 100 Day 2

1st Grade Math »
Unit: Complements of 10 and 20

1st Grade Math »
Unit: Complements of 10 and 20

### A Suitcase of Math Strategies

2nd Grade Math »
Unit: The Numbers Are Getting Bigger

2nd Grade Math »
Unit: The Numbers Are Getting Bigger

### My Special Strategies

2nd Grade Math »
Unit: Strategies That Work

2nd Grade Math »
Unit: Strategies That Work

Common Core Math

### Kindergarten

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### HS Number & Quantity

### HS Algebra

### HS Functions

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### First Grade

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### Ninth and Tenth Grade

### Kindergarten

### First grade

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### Third Grade

### Fourth grade

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### Middle School

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

HS Number & Quantity

HS Algebra

HS Functions

HS Geometry

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

Eighth Grade

Ninth and Tenth Grade

Kindergarten

First grade

Second grade

Third Grade

Fourth grade

Fifth grade

Middle School