← Factor chains for multiplying lesson New set →

Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 35 · 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. 1.46 × 12 =
  2. 2.40 × 15 =
  3. 3.45 × 24 =
  4. 4.47 × 12 =
  5. 5.35 × 14 =
  6. 6.30 × 16 =
  7. 7.14 × 15 =
  8. 8.44 × 24 =
  9. 9.17 × 14 =
  10. 10.44 × 18 =
  11. 11.37 × 18 =
  12. 12.46 × 18 =
  13. 13.26 × 12 =
  14. 14.12 × 12 =
  15. 15.19 × 15 =
  16. 16.28 × 15 =
  17. 17.41 × 12 =
  18. 18.42 × 14 =
  19. 19.14 × 18 =
  20. 20.38 × 18 =
  21. 21.45 × 18 =
  22. 22.24 × 18 =
  23. 23.12 × 16 =
  24. 24.36 × 14 =
  25. 25.33 × 24 =
  26. 26.19 × 24 =
  27. 27.47 × 14 =
  28. 28.11 × 24 =
  29. 29.38 × 12 =
  30. 30.12 × 24 =
  31. 31.20 × 15 =
  32. 32.13 × 12 =
  33. 33.31 × 12 =
  34. 34.22 × 12 =
  35. 35.22 × 14 =
  36. 36.42 × 12 =
  37. 37.34 × 15 =
  38. 38.43 × 16 =
  39. 39.15 × 16 =
  40. 40.34 × 12 =

Answer key

  1. 552
  2. 600
  3. 1080
  4. 564
  5. 490
  6. 480
  7. 210
  8. 1056
  9. 238
  10. 792
  11. 666
  12. 828
  13. 312
  14. 144
  15. 285
  16. 420
  17. 492
  18. 588
  19. 252
  20. 684
  21. 810
  22. 432
  23. 192
  24. 504
  25. 792
  26. 456
  27. 658
  28. 264
  29. 456
  30. 288
  31. 300
  32. 156
  33. 372
  34. 264
  35. 308
  36. 504
  37. 510
  38. 688
  39. 240
  40. 408

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