Worksheet

Missing Numbers in Equations

Grade 1 Math Worksheet - Challenge Me

NameDate

Write the missing number.

  1. 19 + = 20

  2. 18 - = 1

  3. 15 - = 2

  4. - 3 = 7

  5. + 5 = 9

  6. 10 + = 11

  7. 10 + = 13

  8. 5 + = 7

  9. + 6 = 17

  10. - 1 = 11

  11. 11 + = 20

  12. + 2 = 7

  13. + 17 = 19

  14. - 5 = 12

  15. 20 - = 2

  16. + 6 = 12

  17. - 1 = 7

  18. 15 - = 5

PencilGopencilgo.com

Missing Numbers in Equations

Answer Key - Grade 1 Math Worksheet - Challenge Me

Write the missing number.

  1. 19 + 1 = 20

  2. 18 - 17 = 1

  3. 15 - 13 = 2

  4. 10 - 3 = 7

  5. 4 + 5 = 9

  6. 10 + 1 = 11

  7. 10 + 3 = 13

  8. 5 + 2 = 7

  9. 11 + 6 = 17

  10. 12 - 1 = 11

  11. 11 + 9 = 20

  12. 5 + 2 = 7

  13. 2 + 17 = 19

  14. 17 - 5 = 12

  15. 20 - 18 = 2

  16. 6 + 6 = 12

  17. 8 - 1 = 7

  18. 15 - 10 = 5