Unknown Number – 1st Grade Math – 1.OA.D.8 | MA.1.AR.2.3

⭐️This math unit teaches 1st grade students how to determine an unknown whole number in an addition or subtraction equation by breaking down how to relate three whole numbers to build strong number sense. Students will master the process of determining an unknown whole number in an addition or subtraction equation with targeted worksheets, an engaging mini-book, center activities, and games! This unit also includes a pedagogical breakdown explaining how to solve for an unknown whole number and relate three whole numbers, lesson plans, strategy anchor charts, an original song, countless worksheets, and an assessment to allow your students’ many opportunities to develop, reinforce, and review their solving for an unknown number skills.

⭐️This unit is aligned to common core standard 1.OA.D.8 and Florida B.E.S.T. MA.1.AR.2.3. If you do not use Common Core, this packet is still perfect for teaching 1st grade solving for an unknown number in an addition or subtraction equation skills.

⭐️ Highly engaging and comprehensive! Students will love singing and dancing to our original song and video, then creating a mini book all about solving for unknown whole numbers. Their confidence and independence will grow as they grasp the skills in the scaffolded worksheets, followed by reviewing with a game and showing off their knowledge in the unit quiz.

Teachers Just ❤️LOVE❤️ This Resource:

★ Maribel M. said, “It is awesome easy to understand. Students get their own book to work in stations.“

★ Blair B. said, “I don’t know what it is, but making this into books makes my kids so happy and engaged in the same concepts that they are learning in out class lessons.”

★ Colleen S. said, “My students love the alligators– Great unit.”

What’s Included:

1. Pedagogy
2. Lesson Plans
3. Vocabulary Cards
4. Unknown Number: Song & Video
5. Anchor Chart: Count On
6. Goldfish Count On
7. Find the Unknown: Count On
8. Count On Brain Power
9. Anchor Chart: Part-Part-Whole
10. Part-Part-Whole Mat
11. Part-Part-Whole Puzzle Addition
12. Part-Part-Whole Subtraction
13. Anchor Chart: Number Line
14. Number Line Mat
15. Number Line Addition
16. Number Line Subtraction
17. Crack the Code
18. Mini book: Can you find the unknown number?
19. Unknown Number Detective Game
20. Problem Solver
21. Quiz
22. Unknown Number Word Problem Cards

Copyright & Terms of Use

For copyright information and a summary of how this resource can and cannot be used, please review the Terms of Use Page.

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Related Product(s):

Comparing Numbers Greater Than Less Than – 1st Grade

Word Problems Using 3 Numbers – 1st Grade