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Advance A · Week 5 · Advanced Paper-and-Mental Techniques

Day 1 Practice Worksheet — Casting Out Nines

A two-second check that catches most slips.

Name
Date
Score

  1. §1Verify multiplications

    ⏱ 3 min · 20 problems

    Timed drill — start a 3-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.45 × 2=
    2. 02.30 × 5=
    3. 03.64 × 3=
    4. 04.83 × 8=
    5. 05.78 × 2=
    6. 06.18 × 2=
    7. 07.20 × 5=
    8. 08.26 × 4=
    9. 09.49 × 4=
    10. 10.78 × 8=
    11. 11.55 × 6=
    12. 12.43 × 9=
    13. 13.91 × 7=
    14. 14.73 × 7=
    15. 15.23 × 2=
    16. 16.61 × 6=
    17. 17.97 × 8=
    18. 18.59 × 3=
    19. 19.52 × 4=
    20. 20.56 × 9=

Answer Key

§1 · Verify multiplications

  1. 1.90
  2. 2.150
  3. 3.192
  4. 4.664
  5. 5.156
  6. 6.36
  7. 7.100
  8. 8.104
  9. 9.196
  10. 10.624
  11. 11.330
  12. 12.387
  13. 13.637
  14. 14.511
  15. 15.46
  16. 16.366
  17. 17.776
  18. 18.177
  19. 19.208
  20. 20.504