CCSS 1.OA.D.8 - 1st Grade Operations & Algebraic Thinking

1.OA.D.8: Determine the unknown whole number in an addition or subtraction equation

Students fill in the missing number in equations like 8 + ? = 11 or ? - 3 = 4. Browse free printable worksheets aligned to Common Core standard 1.OA.D.8. Every activity is designed by a certified K-5 educator to help 1st grade students master this operations & algebraic thinking standard.

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Understanding Common Core Standard 1.OA.D.8

Full CCSS code: CCSS.MATH.CONTENT.1.OA.D.8

Domain: Operations & Algebraic Thinking (OA)

Grade level: 1st Grade

What this standard covers: Students fill in the missing number in equations like 8 + ? = 11 or ? - 3 = 4.

Frequently Asked Questions About CCSS 1.OA.D.8

What does CCSS 1.OA.D.8 cover?

1.OA.D.8 is a 1st Grade Operations & Algebraic Thinking Common Core standard. Students fill in the missing number in equations like 8 + ? = 11 or ? - 3 = 4.

What grade level is CCSS 1.OA.D.8?

1.OA.D.8 is a 1st Grade standard. Each worksheet on this page is designed for 1st grade students.

Are these 1.OA.D.8 worksheets free to download?

Yes. Every worksheet on AAKollective is 100% free, with no account required. Download instantly as a print-ready PDF.

Can I use these CCSS-aligned worksheets in my classroom?

Absolutely. Teachers are encouraged to use these 1.OA.D.8 worksheets for whole-class instruction, small groups, homework, and as formative assessments. Our license also covers homeschool use.

Where can I find more 1st Grade Operations & Algebraic Thinking worksheets?

Browse our full library of 1st grade math worksheets by visiting the 1st Grade section. Many are tagged with additional CCSS codes in the same Operations & Algebraic Thinking domain.

Other 1st Grade Operations & Algebraic Thinking Standards

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