Addition to 20 - Finding the Unknown - Google Slides™

It's All Primary
Grade Levels
K - 2nd
Resource Type
Formats Included
  • Zip
  • Google Apps™
  • Internet Activities
60 pages
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It's All Primary
Includes Google Apps™
The Teacher-Author indicated this resource includes assets from Google Workspace (e.g. docs, slides, etc.).
Also included in
  1. Adding to 20 is one of the first big set of math skills to teach and reinforce. Give your students lots of practice with this bundle of Addition to 20 Boom Cards & Google Slides™. Students need to build their basic operations fluency. Addition also reiterates place value understanding. Most of t
    Price $20.00Original Price $25.99Save $5.99


When adding to 20, students also need to understand the relationship between the addends and sum. Addition is one of the foundational operation skills for students. These digital slides give students practice for finding the unknown, whether it is the sum or addend. Google Slides™ require the internet to download.

Google Slides can be used in the classroom as part of a whole class activity or in your math centres. Online you can upload them to your Google Classroom or assign them as you see fit.

In this zip file, you will find:

- 60 Google Slides, 20 for each question type

- 20 slides to find the sum

- 20 slides to find the 2nd addend

- 20 slides to find the 1st addend

- student answer sheet

Please note: When you purchase this product, you will be given access to a link that will allow you to open the file in Google Slides™. You’ll then share that file with your students.


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Total Pages
60 pages
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ▯ - 3, 6 + 6 = ▯.


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