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Advance A · Week 2 · Addition & Subtraction Mastery

Day 4 Practice Worksheet — Complements

Finding the complement to 100 and 1000 instantly.

Name
Date
Score

  1. §1Complement to 100

    ⏱ 2 min · 20 problems

    Timed drill — start a 2-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.Complement of 80 to 100=
    2. 02.Complement of 3 to 100=
    3. 03.Complement of 31 to 100=
    4. 04.Complement of 43 to 100=
    5. 05.Complement of 66 to 100=
    6. 06.Complement of 57 to 100=
    7. 07.Complement of 88 to 100=
    8. 08.Complement of 44 to 100=
    9. 09.Complement of 52 to 100=
    10. 10.Complement of 94 to 100=
    11. 11.Complement of 18 to 100=
    12. 12.Complement of 23 to 100=
    13. 13.Complement of 63 to 100=
    14. 14.Complement of 28 to 100=
    15. 15.Complement of 57 to 100=
    16. 16.Complement of 66 to 100=
    17. 17.Complement of 15 to 100=
    18. 18.Complement of 14 to 100=
    19. 19.Complement of 30 to 100=
    20. 20.Complement of 6 to 100=

  2. §2Complement to 1000

    ⏱ 2 min · 20 problems

    Timed drill — start a 2-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.Complement of 918 to 1000=
    2. 02.Complement of 911 to 1000=
    3. 03.Complement of 742 to 1000=
    4. 04.Complement of 468 to 1000=
    5. 05.Complement of 569 to 1000=
    6. 06.Complement of 205 to 1000=
    7. 07.Complement of 150 to 1000=
    8. 08.Complement of 387 to 1000=
    9. 09.Complement of 249 to 1000=
    10. 10.Complement of 209 to 1000=
    11. 11.Complement of 799 to 1000=
    12. 12.Complement of 192 to 1000=
    13. 13.Complement of 661 to 1000=
    14. 14.Complement of 871 to 1000=
    15. 15.Complement of 625 to 1000=
    16. 16.Complement of 934 to 1000=
    17. 17.Complement of 813 to 1000=
    18. 18.Complement of 918 to 1000=
    19. 19.Complement of 895 to 1000=
    20. 20.Complement of 371 to 1000=

Answer Key

§1 · Complement to 100

  1. 1.20
  2. 2.97
  3. 3.69
  4. 4.57
  5. 5.34
  6. 6.43
  7. 7.12
  8. 8.56
  9. 9.48
  10. 10.6
  11. 11.82
  12. 12.77
  13. 13.37
  14. 14.72
  15. 15.43
  16. 16.34
  17. 17.85
  18. 18.86
  19. 19.70
  20. 20.94

§2 · Complement to 1000

  1. 1.82
  2. 2.89
  3. 3.258
  4. 4.532
  5. 5.431
  6. 6.795
  7. 7.850
  8. 8.613
  9. 9.751
  10. 10.791
  11. 11.201
  12. 12.808
  13. 13.339
  14. 14.129
  15. 15.375
  16. 16.66
  17. 17.187
  18. 18.82
  19. 19.105
  20. 20.629