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

Day 3 Practice Worksheet — 3-Digit Cross Multiplication

Same principle, one more cross.

Name
Date
Score

  1. §12-digit × 2-digit (warm-up)

    ⏱ 5 min · 20 problems

    Timed drill — start a 5-minute timer, then solve in order. Goal: finish under time with full accuracy.

    1. 01.25 × 99=
    2. 02.37 × 59=
    3. 03.56 × 19=
    4. 04.57 × 42=
    5. 05.89 × 51=
    6. 06.23 × 73=
    7. 07.88 × 37=
    8. 08.84 × 24=
    9. 09.90 × 69=
    10. 10.19 × 23=
    11. 11.29 × 99=
    12. 12.56 × 40=
    13. 13.28 × 69=
    14. 14.37 × 25=
    15. 15.20 × 45=
    16. 16.74 × 74=
    17. 17.16 × 18=
    18. 18.43 × 38=
    19. 19.22 × 21=
    20. 20.56 × 34=

Answer Key

§1 · 2-digit × 2-digit (warm-up)

  1. 1.2475
  2. 2.2183
  3. 3.1064
  4. 4.2394
  5. 5.4539
  6. 6.1679
  7. 7.3256
  8. 8.2016
  9. 9.6210
  10. 10.437
  11. 11.2871
  12. 12.2240
  13. 13.1932
  14. 14.925
  15. 15.900
  16. 16.5476
  17. 17.288
  18. 18.1634
  19. 19.462
  20. 20.1904