Original Saint Pierre NC.1.OA.8 mathematics packet cover.

Grade 1 · Mathematics

Find the Unknown Number | NC.1.OA.8 | First Grade

A 67-page mathematics worksheet packet for First Grade, focused on Find the Unknown Number. Includes original activities, student workspaces, teaching guidance and worked keys.

Required materials: Use the materials and mathematics technology specified in the packet. Review the selected free sample for preparation guidance.

Formats: PDF · 67 main pages
Lesson time
Includes: Teacher guidance + answer guidance

$7.99 USD

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One-time purchase · Single-teacher license
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22-page selected sample with original activities and supporting pages. The complete 67-page paid packet is not included.

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Sample 1 from Find the Unknown Number | NC.1.OA.8 | First Grade — Page 1 of 67 · Watermarked SAMPLE preview · © 2026 Saint Pierre Learning Resources

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All 67 pages of “Find the Unknown Number | NC.1.OA.8 | First Grade” are shown above, each with SAMPLE watermarks, so you can review the complete resource before buying. The purchased download is the clean, unwatermarked original. Please don’t redistribute preview screenshots.

How this resource helps

Find the Unknown Number — First Grade. This resource focuses on NC.1.OA.8 and provides original mathematical activities, teaching guidance, student workspaces and worked keys. Select tasks for appropriate teaching sessions; the complete bank is not intended as one sitting. The 22-page free sample contains selected complete activities and supporting pages. The full 67-page original PDF is delivered separately as the protected customer download.

What’s Included

Complete 67-page original PDF
Original mathematics activities and student workspaces
Teaching guidance and worked keys
22-page selected free sample

Resource details

Grade / course: Grade 1
Subject and resource type: Mathematics · Worksheet packet
Files: 67 main PDF pages · PDF
Estimated completion time
Answer key: Worked keys and teaching guidance included in the original packet.

Standard or objective

NC.1.OA.8 — Find the Unknown Number (North Carolina mathematics)

Printing and preparation

Print on US Letter paper at actual size. Separate student practice and assessment from the teacher guide and key. Review the model and prepare needed support materials.

License

For one teacher’s own classroom use. Do not resell, redistribute files, or post them publicly. See the full license.