← Factor chains for multiplying lesson New set →

Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 606 · 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. 1.49 × 16 =
  2. 2.38 × 14 =
  3. 3.20 × 15 =
  4. 4.23 × 15 =
  5. 5.14 × 12 =
  6. 6.22 × 18 =
  7. 7.38 × 16 =
  8. 8.47 × 16 =
  9. 9.20 × 12 =
  10. 10.18 × 12 =
  11. 11.11 × 14 =
  12. 12.40 × 24 =
  13. 13.34 × 16 =
  14. 14.18 × 15 =
  15. 15.20 × 16 =
  16. 16.45 × 14 =
  17. 17.12 × 14 =
  18. 18.11 × 18 =
  19. 19.40 × 12 =
  20. 20.47 × 14 =
  21. 21.20 × 18 =
  22. 22.28 × 16 =
  23. 23.22 × 14 =
  24. 24.25 × 24 =
  25. 25.16 × 15 =
  26. 26.32 × 16 =
  27. 27.38 × 15 =
  28. 28.15 × 14 =
  29. 29.48 × 16 =
  30. 30.42 × 18 =
  31. 31.27 × 18 =
  32. 32.30 × 16 =
  33. 33.44 × 18 =
  34. 34.44 × 15 =
  35. 35.35 × 15 =
  36. 36.48 × 14 =
  37. 37.17 × 14 =
  38. 38.30 × 24 =
  39. 39.21 × 14 =
  40. 40.28 × 12 =

Answer key

  1. 784
  2. 532
  3. 300
  4. 345
  5. 168
  6. 396
  7. 608
  8. 752
  9. 240
  10. 216
  11. 154
  12. 960
  13. 544
  14. 270
  15. 320
  16. 630
  17. 168
  18. 198
  19. 480
  20. 658
  21. 360
  22. 448
  23. 308
  24. 600
  25. 240
  26. 512
  27. 570
  28. 210
  29. 768
  30. 756
  31. 486
  32. 480
  33. 792
  34. 660
  35. 525
  36. 672
  37. 238
  38. 720
  39. 294
  40. 336

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks