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Common Core Standard 1.OA.D.8 Questions

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

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Grade 1 Addition CCSS: 1.OA.D.8
7 + 5 =                
  1. 10
  2. 11
  3. 12
Grade 1 Subtraction CCSS: 1.OA.D.8
What number is missing?

9-□=7
  1. 2
  2. 7
  3. 16
  4. 17
Grade 1 Addition with Regrouping CCSS: 1.OA.D.8
               + 6 = 10
  1. 4
  2. 5
Grade 1 Addition CCSS: 1.OA.D.8
9 + □ = 11
  1. 4
  2. 3
  3. 2
  4. 1
Grade 1 Addition CCSS: 1.OA.D.8
□ + 7 = 19
  1. 12
  2. 11
  3. 13
  4. 10
Grade 1 Addition with Regrouping CCSS: 1.OA.D.8
What number is missing?

5 +                 = 10
  1. 7
  2. 6
  3. 5
  4. 4
Grade 1 Addition CCSS: 1.OA.D.8
5+?=12
  1. 5
  2. 7
  3. 12
  4. 10
Grade 1 Addition with Regrouping CCSS: 1.OA.D.8
What number is missing?

8 +                 = 11
  1. 3
  2. 4
  3. 6
  4. 10
Grade 1 Addition CCSS: 1.OA.D.8
8+?=11
  1. 2
  2. 8
  3. 3
  4. 6
Grade 1 Subtraction CCSS: 1.OA.D.8
?-3=10
  1. 15
  2. 13
  3. 16
  4. 18
Grade 1 Addition CCSS: 1.OA.D.8
Which number sentence is missing 9?
  1. 4 + _____ = 13
  2. 3 + _____ = 11
  3. 6 + _____ = 12

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