Worksheet

Missing Addends Within 20

Grade 1 Math Worksheet - Challenge Me

NameDate

Write the answer on the line.

  1. Fill the blank: + 8 = 20.

  2. 8 is made from 4 and what number?

  3. What number completes 9 + = 17?

  4. What number completes 12 + = 15?

  5. What number completes 2 + = 9?

  6. 15 is made from 8 and what number?

  7. What number completes 10 + = 16?

  8. Fill the blank: + 8 = 10.

  9. Fill the blank: + 5 = 13.

  10. What number completes 1 + = 11?

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Missing Addends Within 20

Answer Key - Grade 1 Math Worksheet - Challenge Me

Write the answer on the line.

  1. Fill the blank: 12 + 8 = 20.

  2. 8 is made from 4 and what number?

    4

  3. What number completes 9 + 8 = 17?

  4. What number completes 12 + 3 = 15?

  5. What number completes 2 + 7 = 9?

  6. 15 is made from 8 and what number?

    7

  7. What number completes 10 + 6 = 16?

  8. Fill the blank: 2 + 8 = 10.

  9. Fill the blank: 8 + 5 = 13.

  10. What number completes 1 + 10 = 11?