← Factor chains for multiplying lesson New set →

Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 718 · 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. 1.16 × 12 =
  2. 2.21 × 16 =
  3. 3.13 × 12 =
  4. 4.36 × 24 =
  5. 5.11 × 24 =
  6. 6.45 × 16 =
  7. 7.19 × 24 =
  8. 8.24 × 14 =
  9. 9.23 × 12 =
  10. 10.34 × 18 =
  11. 11.49 × 16 =
  12. 12.11 × 16 =
  13. 13.36 × 12 =
  14. 14.22 × 14 =
  15. 15.11 × 18 =
  16. 16.29 × 24 =
  17. 17.16 × 16 =
  18. 18.21 × 14 =
  19. 19.13 × 15 =
  20. 20.36 × 14 =
  21. 21.13 × 14 =
  22. 22.12 × 16 =
  23. 23.32 × 15 =
  24. 24.30 × 18 =
  25. 25.26 × 24 =
  26. 26.39 × 12 =
  27. 27.24 × 18 =
  28. 28.24 × 15 =
  29. 29.22 × 18 =
  30. 30.48 × 18 =
  31. 31.15 × 15 =
  32. 32.15 × 16 =
  33. 33.17 × 18 =
  34. 34.38 × 14 =
  35. 35.22 × 24 =
  36. 36.33 × 15 =
  37. 37.20 × 16 =
  38. 38.42 × 14 =
  39. 39.14 × 16 =
  40. 40.16 × 14 =

Answer key

  1. 192
  2. 336
  3. 156
  4. 864
  5. 264
  6. 720
  7. 456
  8. 336
  9. 276
  10. 612
  11. 784
  12. 176
  13. 432
  14. 308
  15. 198
  16. 696
  17. 256
  18. 294
  19. 195
  20. 504
  21. 182
  22. 192
  23. 480
  24. 540
  25. 624
  26. 468
  27. 432
  28. 360
  29. 396
  30. 864
  31. 225
  32. 240
  33. 306
  34. 532
  35. 528
  36. 495
  37. 320
  38. 588
  39. 224
  40. 224

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