Unit: Addition and Subtraction

 

This unit builds on the work on Basic Skills: Addition and Subtraction, Level 1. 

Key topics include:

  • Fact Families and Equations
  • Using Place Value to Add and Subtract
  • Adding and Subtracting Powers of 10
  • Solving Addition and Subtraction Equations

Grades: 2-3

CCSS: 

CCSS.MATH.CONTENT.1.NBT.C.4, CCSS.MATH.CONTENT.1.NBT.C.5, CCSS.MATH.CONTENT.2.OA.A.1, CCSS.MATH.CONTENT.2.NBT.B.9, CCSS.MATH.CONTENT.2.OA.B.2, CCSS.MATH.CONTENT.1.OA.A.1, CCSS.MATH.CONTENT.1.OA.D.7, CCSS.MATH.CONTENT.1.OA.D.8

The suggested timeframe for each lesson can be adapted to suit your needs.

Days 1-2: Speaking Math

Goal: Gain an understanding of the key words used throughout this unit.

These are the key terms you will learn in this unit:

  1. Place Value
  2. Ones Place
  3. Tens Place
  4. Hundreds Place
  5. Fact Family
  6. Addition Expression
  7. Subtraction Expression
  8. Regrouping
  9. Borrowing
  10. Carry over

Day 1

  • Key Terms
  • Slide Show: Math Vocabulary
  • Word Search Puzzles

Day 2

  • Tutorial: Writing Numbers Based on Place Value
  • Interactive Math Game: Name That Place!
  • Worksheet: Writing Numbers Based on Place Value

Media4Math Resources:

 

 

 

 

Days 3-4: Building Blocks

Goal: To define fact families for addition and subtraction.

Day 3

  • Tutorial: What Is a Fact Family?
  • Tutorial: How to Create a Fact Family
  • Interactive Math Game: Fact Fam
  • Worksheet: Fact Families

 Day 4

  • Tutorial: Using Fact Families to Solve Equations
  • Worksheet: Solving Addition Equations
  • Worksheet: Solving Subtraction Equations

Media4Math Resources:

 

 

 

Days 5-6: Putting it Together

Goal: Using place value to add and subtract numbers.

Day 5

  • Video Tutorial: What Is Place Value?
  • Slide Show: Using Place Value to Add Numbers to 10 (Optional)
  • Tutorial: Using Place Value to Add Numbers to 20
  • Worksheet: Sums to 20

Day 6

  • Tutorial: Using Place Value to Subtract Numbers
  • Slide Show: Math Examples: Adding and Subtracting with Regrouping
  • Worksheet: Subtracting Using Place Value
  • Worksheet:Differences to 10
     

Media4Math Resources:

 

 

 

Days 7-8: Show What You Know

Goals: Adding and subtracting powers of 10. Solving addition and subtraction equations.

Day 7

  • Video Tutorial: Making 10's
  • Video Tutorial: Counting by 10's
  • Tutorial: Adding and Subtracting with Powers of 10
  • Worksheet: Adding by Powers of 10
  • Worksheet: Subtracting by Powers of 10

Day 8

  • Tutorial: Solving Addition and Subtraction Equations
  • Worksheet: Solving Addition Equations
  • Worksheet: Solving Subtraction Equations

Media4Math Resources: