← Factor chains for multiplying lesson New set →

Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 970 · 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. 1.11 × 12 =
  2. 2.20 × 15 =
  3. 3.30 × 24 =
  4. 4.44 × 15 =
  5. 5.16 × 16 =
  6. 6.19 × 24 =
  7. 7.17 × 16 =
  8. 8.28 × 24 =
  9. 9.35 × 24 =
  10. 10.22 × 16 =
  11. 11.35 × 14 =
  12. 12.36 × 16 =
  13. 13.37 × 18 =
  14. 14.28 × 14 =
  15. 15.46 × 14 =
  16. 16.33 × 15 =
  17. 17.20 × 12 =
  18. 18.14 × 24 =
  19. 19.48 × 15 =
  20. 20.44 × 18 =
  21. 21.37 × 16 =
  22. 22.40 × 15 =
  23. 23.47 × 14 =
  24. 24.18 × 12 =
  25. 25.29 × 15 =
  26. 26.47 × 12 =
  27. 27.12 × 12 =
  28. 28.37 × 24 =
  29. 29.43 × 12 =
  30. 30.27 × 18 =
  31. 31.25 × 12 =
  32. 32.17 × 24 =
  33. 33.49 × 12 =
  34. 34.49 × 15 =
  35. 35.31 × 14 =
  36. 36.11 × 16 =
  37. 37.36 × 12 =
  38. 38.31 × 18 =
  39. 39.21 × 16 =
  40. 40.18 × 14 =

Answer key

  1. 132
  2. 300
  3. 720
  4. 660
  5. 256
  6. 456
  7. 272
  8. 672
  9. 840
  10. 352
  11. 490
  12. 576
  13. 666
  14. 392
  15. 644
  16. 495
  17. 240
  18. 336
  19. 720
  20. 792
  21. 592
  22. 600
  23. 658
  24. 216
  25. 435
  26. 564
  27. 144
  28. 888
  29. 516
  30. 486
  31. 300
  32. 408
  33. 588
  34. 735
  35. 434
  36. 176
  37. 432
  38. 558
  39. 336
  40. 252

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