Adding 3 Numbers Up to 20: A Multilevel Approach

This comprehensive set of resources offers a structured method for teaching addition of three numbers up to 20, containing (almost unlimited) worksheets and digital material suitable for the PC or Mac or Interactive Whiteboard use.

Core Components

- 9 core lessons with worksheets and teaching resources

- 2 challenge lessons (worksheets only)

- Interactive teaching resources for whiteboard use

Lesson  Structure

1. Support through counting: Introduces basic addition using visual aids to help students understand the concept of combining numbers.

2. Two-stage addition strategy: Teaches students to add the first two numbers before incorporating the third, breaking down the process into manageable steps.

3. Finding pairs that sum to 10: Focuses on identifying number pairs that add up to 10, a very useful skill for mental math and future addition strategies.

4. Practice with chosen strategy: Allows students to apply their preferred method from the previous lessons, reinforcing their understanding and building confidence.

5. Introducing simple word problems using numerical digits within the sentences.

6. Full word problems with numbers in words.

7. Missing number exercises (numbers only): Challenges students to find an unknown addend in equations.

8. Missing number word problems using numerical digits within the sentences.

9. Missing number full word problems.

Challenge Lessons

10. Adding 3 numbers up to 50: Extends the addition concept to larger numbers, pushing students beyond the initial 20-number limit.

11. Finding missing numbers up to 50: Combines larger numbers with missing addend problems, offering an advanced challenge for proficient students.

Worksheets per Lesson Set: The worksheets are virtually limitless. With a click of a button, numbers are randomized, which means that each worksheet is different. These worksheets are ideal not just for class time practice but also for math centers, end-of-lesson activities, or as resources for substitute teachers, homework assignments, requiring minimal instructions.

Answers are generated automatically with each new worksheet.

Interactive Teaching Pages
The Teaching Pages, designed for use with Interactive Whiteboards, help to introduce the content of the worksheets for the whole class.. 

Compatibility Note
It is essential to note that these resources can be downloaded as PDF documents. They operate with the official Adobe Acrobat Reader on both Windows and Mac.