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Math Grade K-1 Answer Key

Missing Numbers: Fill in the Blank

Practice counting forward and finding numbers that come next

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Missing Numbers: Fill in the Blank

Practice counting forward and finding numbers that come next

Math - Grade K-1

Instructions: Read each number sentence or number pattern. Write the missing number in the blank. Count carefully and show your thinking when needed.
  1. 1

    Fill in the blank: 1, 2, __, 4, 5

    Count up from 1.

    The missing number is 3 because 3 comes after 2 and before 4.
  2. 2

    Fill in the blank: 6, 7, __, 9, 10

    The missing number is 8 because 8 comes after 7 and before 9.
  3. 3

    What number is missing? 3 + __ = 4

    Think about how many steps it takes to count from 3 to 4.

    The missing number is 1 because 3 and 1 more make 4.
  4. 4

    Fill in the blank: 10, 11, 12, __, 14

    The missing number is 13 because 13 comes after 12 and before 14.
  5. 5

    Fill in the blank: __, 2, 3, 4

    Start counting at 1.

    The missing number is 1 because 1 comes before 2 when counting forward.
  6. 6

    What number is missing? 5 + __ = 7

    The missing number is 2 because 5 and 2 more make 7.
  7. 7

    Fill in the blank: 15, 16, __, 18, 19

    Count forward from 15.

    The missing number is 17 because 17 comes after 16 and before 18.
  8. 8

    Fill in the blank: 8, __, 10, 11

    The missing number is 9 because 9 comes after 8 and before 10.
  9. 9

    What number is missing? __ + 1 = 6

    Find the number that comes right before 6.

    The missing number is 5 because 5 and 1 more make 6.
  10. 10

    Fill in the blank: 0, 1, __, 3, 4

    The missing number is 2 because 2 comes after 1 and before 3.
  11. 11

    Fill in the blank: 12, __, 14, 15

    Count 12, 13, 14, 15.

    The missing number is 13 because 13 comes after 12 and before 14.
  12. 12

    What number is missing? 2 + __ = 5

    The missing number is 3 because 2 and 3 more make 5.
  13. 13

    Fill in the blank: __, 18, 19, 20

    Count backward one number from 18.

    The missing number is 17 because 17 comes before 18 when counting forward.
  14. 14

    Fill in the blank: 4, 5, 6, __, 8

    The missing number is 7 because 7 comes after 6 and before 8.
  15. 15

    What number is missing? 9 + __ = 10

    Think about the next number after 9.

    The missing number is 1 because 9 and 1 more make 10.
LivePhysics™.com Math - Grade K-1 - Answer Key