2.NBT.A.1

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- 2.NBT.A.1Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
- 2.NBT.A.2Count within 1000; skip-count by 5s, 10s, and 100s.
- 2.NBT.A.3Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
- 2.NBT.A.4Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

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## 2.NBT.A.1

## Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

12 Lesson(s)

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### Each Number Has a Place: Tens and Ones

2nd Grade Math »
Unit: Each Number Has a Place

2nd Grade Math »
Unit: Each Number Has a Place

Big Idea:

#### The big idea of this lesson is that the base-ten number system uses models to show numbers. The ones digit represents how many ones, and the tens digit represents how many groups of ten.

Standards:

Favorites
(57)

Resources
(15)

Reflections
(1)

### Odd or Even

2nd Grade Math »
Unit: Each Number Has a Place

2nd Grade Math »
Unit: Each Number Has a Place

### 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

### Moving Along In Tens

2nd Grade Math »
Unit: Everything In Its Place

2nd Grade Math »
Unit: Everything In Its Place

Big Idea:

#### Grouping by tens reinforces the understanding of place value

Standards:

Favorites
(5)

Resources
(11)

Reflections
(1)

### 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

### How Big Is One Thousand

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

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

Big Idea:

#### Students can get a picture of how big 1,000 is as they build and compare 3-digit numbers.

Standards:

Favorites
(1)

Resources
(11)

Reflections
(1)

### Put It Together and Take It Apart

2nd Grade Math »
Unit: Numbers Have Patterns

2nd Grade Math »
Unit: Numbers Have Patterns

### Students as Teachers Part II

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

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

Common Core Math

### 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

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