Common Core math · Grade 1 · Operations & Algebraic Thinking

1.OA.D.8

Find the missing number in a number sentence.

What 1.OA.D.8 says

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.

Grade: Grade 1
Domain: OA — Operations & Algebraic Thinking
Full code: CCSS.MATH.CONTENT.1.OA.D.8

Free worksheets for 1.OA.D.8

29 aligned worksheets — showing 24. Every one is a free printable PDF. No account, no email, no paywall.

More free Grade 1 math

Other Grade 1 standards

1.OA.A.1 1.OA.B.3 1.OA.B.4 1.OA.C.5 1.OA.C.6 1.NBT.A.1

1.OA.D.8 — common questions

What is 1.OA.D.8?

1.OA.D.8 is a Grade 1 Common Core math standard in the Operations & Algebraic Thinking domain. It reads: “Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.”

What grade is 1.OA.D.8?

1.OA.D.8 is a Grade 1 standard. The number straight after the domain letters is the grade, so the “1” in 1.OA.D.8 means Grade 1.

What does the code 1.OA.D.8 stand for?

Read it left to right: 1 is the grade, OA is the domain (Operations & Algebraic Thinking), and the last number is the standard within that domain. The full identifier is CCSS.MATH.CONTENT.1.OA.D.8.

Are there free worksheets for 1.OA.D.8?

Yes — 29 printable worksheets on this page are aligned to 1.OA.D.8. Every one is a free PDF with no account, no email and no paywall.