Adding Numbers Within 20
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: 2
Lesson Length: 15 minutes or less
Keywords/Tags: addition within 20
Lesson Description: In this lesson students will learn the strategy of counting on to add numbers within 20. The strategy is not named specifically in the lesson, but is modeled and will be more explicitly discussed once the foundation has been laid.

  • Other 1NR.2.1 Use a variety of strategies to solve addition problems within 20.
  • Other 2.NR.2.1 Fluently add and subtract within 20 using a variety of mental, part-whole strategies
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Video : Addition Within 20
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: Learn how to add numbers within 20.
Resources : Addition Practice
Instructions: Use these to practice addition.
Add and Match the Numbers Game
The maze is ready. The goblets are ready. The monsters are ready. Are you ready to free the monsters and help them fly together? The game will help your young mathematician to practice more on the concepts of addition. The game involves numbers within 20, it is important for students to gain confidence in a concept by working at different levels of complexity.
Find the Sum within 20 Game
Struggles with addition can be easily overcome if students practice the concept in a fun and engaging way! The game encourages students to apply their understanding of addition to find the total. The game involves numbers within 20, it is important for students to gain confidence in a concept by working at different levels of complexity.
Description: Activities for practicing addition
Quiz : Adding Within 20
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1

3 + 4 =  ___

Question #2

7 + 1 =  ___

Question #3

5 + 7 =  ___

Question #4

6 + 4 =  ___

Question #5

8 + 7 =  ___

Description: Show what you know about adding numbers within 20.
Resources : Virtual Manipulatives
Instructions: You can use these to help you in your math practice.
Virtual Interactive Counters
You can use these to help you as you are solving addition problems.
Bear Counters
Interactive Manipulatives
Shape Counters
Interactive Manipulatives
Description: These are a variety of virtual manipulatives you can use in math practice.