3 Addend Addition 1st Grade Math Worksheets & Lessons for Adding 3 Numbers

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  1. Set your year up for success with this full-year 1st grade math curriculum! These ready to use math resources come with 14 units that provide differentiated small group math instruction for 1st graders.  Having engaging and fun 1st grade math centers will allow your students to learn and thrive in y
    Price $92.40Original Price $130.75Save $38.35


Are you looking for engaging and purposeful grade 1 math resources? These 3 addend addition lesson plans will help you teach your students all about adding 3 numbers together.  These 1st grade math worksheets and games will leave your students begging for more math time!

This 3 addend addition resource includes math center games, activities, and lessons that are differentiated to teach your students exactly what they need to know in order to master the 1st grade common core math standards 1.OA.A.2, 1.OA.B.3, 1.OA.C.6 in no time! Plus, you can differentiate for all of your students with these 1st grade math worksheets, games and centers! 

Included with these 1st grade math lessons:

  • 5 daily lesson plans
  • Differentiated student work mats
  • Answer Keys
  • Differentiated independent practice pages
  • Games with each lesson
  • Questions to ask during lessons
  • Challenges at the end of each lesson
  • Differentiated word problems to use in each lesson

You can use this pack of 1st grade math worksheets and lessons to help you teach adding 3 numbers to your students. Use them during math lessons during small group time and then spiral review them in the morning! The practice pages can be used as homework, morning work, centers, or as pre and post assessment. 

❤️Your students will LOVE using the math center games! Plus, they will gain a deeper understanding of 3 addend addition from the independent worksheets and practice pages that they can complete after the small group table to show what they know.

❤️Reasons to LOVE these 1st grade math worksheets, games and lessons!❤️

  1. They are differentiated! There are differentiated work mats, equation cards, independent practice pages and much more for 3 levels of groups. 
  2. They are meant to be ink friendly and very low prep! Almost every page in these lessons can be printed on color paper or even just plain white paper to save on ink. 
  3. They are teacher friendly! Prep consists of printing the lesson plan, work mats front to back for each group, and games. Use dry erase pocket sleeves with the work mats and laminate the games and then save these materials to use year after year! 

Grade 1 math lessons include:

⭐️Strategies to Add 3 Whole Numbers

⭐️Contextual problems: add to-result unknown put together/take apart-total

unknown Day 1

⭐️Contextual problems: add to-result unknown put together/take apart-total

unknown Day 2

⭐️Contextual problems: add to-change unknown, and put together/take apart

addend unknown Day 1

⭐️Contextual problems: add to-change unknown, and put together/take apart

addend unknown Day 2

✅Check out the preview for a closer look at these grade 1 math resources and lessons all about adding 3 numbers! 


✅ Try a free lesson from unit 1 here!

What are teachers saying about the grade 1 math resources?

⭐️⭐️⭐️⭐️⭐️ “Lots of options here.  Great practice and very engaging!” - Vanessa H.

⭐️⭐️⭐️⭐️⭐️ “Very engaging and rigorous.” - Helen J.

⭐️⭐️⭐️⭐️⭐️ “Wow! This packet is loaded with goodies!  I really like to work mats and all of the word problems. Such a time saver!” - Patricia C.

Want more information about these guided math lessons? 

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166 pages
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to see state-specific standards (only available in the US).
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Apply properties of operations as strategies to add and subtract. If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).


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