Videos and solutions to help Grade 2 students learn to add 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.

Explain why addition and subtraction strategies work, using place value and the properties of operations.

Common Core: 2.NBT.7 and 2.NBT.9

- I can use concrete models or drawings to show how to add and subtract within 1000 using a strategy based on place value (collecting the hundreds, tens, and ones, and when necessary, composing ten ones to make a ten or composing ten tens to make a hundred.)
- I can use base ten manipulatives (e.g., base ten blocks, Digi-Blocks, stacks of cubes, bundles of sticks, place value arrow cards)
- I know the value of each place in a number
- I know the value of a digit in a specific place
- I know that the placement of a digit affects the value of that digit

- I can explain addition and subtraction using place value.
- I can explain addition and subtraction using the properties of operations (commutative, associative, identity).

Related Topics:

More Lessons for Grade 2

Common Core for Grade 2

Using Base-10 Blocks.

Using Base-10 Blocks.

This tutorial will show you how to solve 3 digit by 3 digit addition problems using the Jump Method or Empty Number Line.

This tutorial will show you how to solve 3 digit by 3 digit addition problems using the Split Strategy.

3-digit Addition Strategies

Add using Base-10 Model Drawings

Add using Place Values

Add using Number Line

This tutorial will show you how to use the compensation strategy to help you to solve addition problems.

Addition Strategies

Adding using true values, Make a Ten, Compensation.

This video for teachers and parents explains Addition Strategies which include Math Drawings, Show All Totals, New Groups Below and New Groups Above.

Addition Strategies within 1000

This video for teachers and parents explores the Common Core Standards for 2nd Grade to see how we can use place value, dollar bills, number line, number bonds and properties of operations to help students develop addition strategies.

Using Base-10 Blocks.

Using Base-10 Blocks.

Subtracting in Parts, Adding Up using the Number Line, Subtracting Back using the Number Lines.

Subtracting Strategies

Subtracting in Parts, Adding Up, Subtracting Back, Compensation.

The Common Core State Standards (CCSS) videos are designed to support states, schools, and teachers in the implementation of the CCSS. Each video is an audiovisual resource that focuses on one or more specific standards and usually includes examples/illustrations geared to enhancing understanding. The intent of each content-focused video is to clarify the meaning of the individual standard rather than to be a guide on how to teach each standard although the examples can be adapted for instructional use.

2.NBT.9