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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. 01.41 × 89=
    2. 02.83 × 29=
    3. 03.50 × 88=
    4. 04.80 × 58=
    5. 05.56 × 44=
    6. 06.40 × 56=
    7. 07.39 × 63=
    8. 08.64 × 89=
    9. 09.82 × 21=
    10. 10.32 × 90=
    11. 11.70 × 86=
    12. 12.80 × 71=
    13. 13.31 × 87=
    14. 14.28 × 55=
    15. 15.84 × 50=
    16. 16.28 × 22=
    17. 17.12 × 22=
    18. 18.11 × 27=
    19. 19.95 × 88=
    20. 20.13 × 97=

Answer Key

§1 · 2-digit × 2-digit (warm-up)

  1. 1.3649
  2. 2.2407
  3. 3.4400
  4. 4.4640
  5. 5.2464
  6. 6.2240
  7. 7.2457
  8. 8.5696
  9. 9.1722
  10. 10.2880
  11. 11.6020
  12. 12.5680
  13. 13.2697
  14. 14.1540
  15. 15.4200
  16. 16.616
  17. 17.264
  18. 18.297
  19. 19.8360
  20. 20.1261