⭐️Lessons, Activities, worksheets, and assessments to practice how to find unknown number for 1st grade students.

⭐️This unit includes lesson plans, an original song, and video, vocabulary cards, anchor charts, mini book, worksheets, a quiz, and a center game to teach and reinforce this concept.

⭐️Build strong number sense in your students! Students will work towards mastering how to determine the unknown whole number in an addition or subtraction equation relating three whole numbers.

⭐️Created to align with1.OA.D.8 and Florida B.E.S.T. MA.1.AR.2.3.

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