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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. 01.87 × 5=
    2. 02.81 × 8=
    3. 03.29 × 6=
    4. 04.99 × 5=
    5. 05.77 × 6=
    6. 06.70 × 6=
    7. 07.45 × 8=
    8. 08.45 × 6=
    9. 09.45 × 4=
    10. 10.60 × 6=
    11. 11.78 × 9=
    12. 12.91 × 2=
    13. 13.92 × 8=
    14. 14.63 × 2=
    15. 15.51 × 8=
    16. 16.16 × 3=
    17. 17.98 × 3=
    18. 18.97 × 9=
    19. 19.81 × 9=
    20. 20.81 × 5=

Answer Key

§1 · Verify multiplications

  1. 1.435
  2. 2.648
  3. 3.174
  4. 4.495
  5. 5.462
  6. 6.420
  7. 7.360
  8. 8.270
  9. 9.180
  10. 10.360
  11. 11.702
  12. 12.182
  13. 13.736
  14. 14.126
  15. 15.408
  16. 16.48
  17. 17.294
  18. 18.873
  19. 19.729
  20. 20.405