← Factor chains for multiplying lesson New set →

Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 389 · 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 × 24 =
  2. 2.45 × 12 =
  3. 3.23 × 16 =
  4. 4.46 × 14 =
  5. 5.27 × 18 =
  6. 6.14 × 14 =
  7. 7.13 × 12 =
  8. 8.41 × 12 =
  9. 9.48 × 14 =
  10. 10.22 × 15 =
  11. 11.19 × 18 =
  12. 12.18 × 16 =
  13. 13.49 × 14 =
  14. 14.40 × 16 =
  15. 15.13 × 24 =
  16. 16.30 × 12 =
  17. 17.39 × 16 =
  18. 18.31 × 14 =
  19. 19.28 × 14 =
  20. 20.35 × 16 =
  21. 21.26 × 12 =
  22. 22.37 × 18 =
  23. 23.22 × 12 =
  24. 24.36 × 16 =
  25. 25.24 × 14 =
  26. 26.11 × 12 =
  27. 27.35 × 14 =
  28. 28.16 × 15 =
  29. 29.37 × 24 =
  30. 30.30 × 15 =
  31. 31.20 × 24 =
  32. 32.24 × 16 =
  33. 33.25 × 16 =
  34. 34.25 × 15 =
  35. 35.20 × 16 =
  36. 36.39 × 15 =
  37. 37.41 × 18 =
  38. 38.15 × 14 =
  39. 39.34 × 24 =
  40. 40.26 × 15 =

Answer key

  1. 384
  2. 540
  3. 368
  4. 644
  5. 486
  6. 196
  7. 156
  8. 492
  9. 672
  10. 330
  11. 342
  12. 288
  13. 686
  14. 640
  15. 312
  16. 360
  17. 624
  18. 434
  19. 392
  20. 560
  21. 312
  22. 666
  23. 264
  24. 576
  25. 336
  26. 132
  27. 490
  28. 240
  29. 888
  30. 450
  31. 480
  32. 384
  33. 400
  34. 375
  35. 320
  36. 585
  37. 738
  38. 210
  39. 816
  40. 390

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