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Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 780 · 40 questions
TalentJR

The trick (Chain the factors): Split the multiplier into two small factors: 12 = 3 × 4, 14 = 2 × 7, 15 = 3 × 5, 16 = 4 × 4, 18 = 2 × 9, 24 = 4 × 6. Multiply by the first factor. Multiply that answer by the second factor (× 4 is double, double).

NameDateTime takenScore ___ / 40
  1. 1.26 × 14 =
  2. 2.30 × 14 =
  3. 3.48 × 12 =
  4. 4.17 × 14 =
  5. 5.40 × 16 =
  6. 6.42 × 14 =
  7. 7.40 × 15 =
  8. 8.18 × 15 =
  9. 9.18 × 12 =
  10. 10.40 × 24 =
  11. 11.32 × 14 =
  12. 12.37 × 14 =
  13. 13.28 × 14 =
  14. 14.28 × 15 =
  15. 15.22 × 15 =
  16. 16.22 × 14 =
  17. 17.38 × 18 =
  18. 18.13 × 15 =
  19. 19.35 × 12 =
  20. 20.34 × 24 =
  21. 21.29 × 15 =
  22. 22.35 × 16 =
  23. 23.19 × 24 =
  24. 24.48 × 14 =
  25. 25.29 × 14 =
  26. 26.11 × 12 =
  27. 27.37 × 12 =
  28. 28.31 × 14 =
  29. 29.11 × 15 =
  30. 30.28 × 12 =
  31. 31.48 × 16 =
  32. 32.25 × 18 =
  33. 33.48 × 15 =
  34. 34.11 × 14 =
  35. 35.36 × 16 =
  36. 36.30 × 15 =
  37. 37.24 × 12 =
  38. 38.33 × 14 =
  39. 39.16 × 24 =
  40. 40.27 × 14 =

Answer key

  1. 364
  2. 420
  3. 576
  4. 238
  5. 640
  6. 588
  7. 600
  8. 270
  9. 216
  10. 960
  11. 448
  12. 518
  13. 392
  14. 420
  15. 330
  16. 308
  17. 684
  18. 195
  19. 420
  20. 816
  21. 435
  22. 560
  23. 456
  24. 672
  25. 406
  26. 132
  27. 444
  28. 434
  29. 165
  30. 336
  31. 768
  32. 450
  33. 720
  34. 154
  35. 576
  36. 450
  37. 288
  38. 462
  39. 384
  40. 378

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