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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 268 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.32 × 15 =
  2. 2.27 × 15 =
  3. 3.61 × 15 =
  4. 4.19 × 15 =
  5. 5.53 × 15 =
  6. 6.37 × 15 =
  7. 7.23 × 15 =
  8. 8.48 × 15 =
  9. 9.59 × 15 =
  10. 10.35 × 15 =
  11. 11.20 × 15 =
  12. 12.15 × 15 =
  13. 13.35 × 15 =
  14. 14.60 × 15 =
  15. 15.28 × 15 =
  16. 16.25 × 15 =
  17. 17.55 × 15 =
  18. 18.60 × 15 =
  19. 19.23 × 15 =
  20. 20.19 × 15 =
  21. 21.31 × 15 =
  22. 22.18 × 15 =
  23. 23.43 × 15 =
  24. 24.31 × 15 =
  25. 25.50 × 15 =
  26. 26.59 × 15 =
  27. 27.47 × 15 =
  28. 28.23 × 15 =
  29. 29.24 × 15 =
  30. 30.10 × 15 =
  31. 31.6 × 15 =
  32. 32.16 × 15 =
  33. 33.40 × 15 =
  34. 34.18 × 15 =
  35. 35.44 × 15 =
  36. 36.5 × 15 =
  37. 37.49 × 15 =
  38. 38.38 × 15 =
  39. 39.10 × 15 =
  40. 40.19 × 15 =

Answer key

  1. 480
  2. 405
  3. 915
  4. 285
  5. 795
  6. 555
  7. 345
  8. 720
  9. 885
  10. 525
  11. 300
  12. 225
  13. 525
  14. 900
  15. 420
  16. 375
  17. 825
  18. 900
  19. 345
  20. 285
  21. 465
  22. 270
  23. 645
  24. 465
  25. 750
  26. 885
  27. 705
  28. 345
  29. 360
  30. 150
  31. 90
  32. 240
  33. 600
  34. 270
  35. 660
  36. 75
  37. 735
  38. 570
  39. 150
  40. 285

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