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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 808 · 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. 1.20 × 15 =
  2. 2.40 × 15 =
  3. 3.55 × 15 =
  4. 4.45 × 15 =
  5. 5.33 × 15 =
  6. 6.12 × 15 =
  7. 7.14 × 15 =
  8. 8.44 × 15 =
  9. 9.53 × 15 =
  10. 10.63 × 15 =
  11. 11.63 × 15 =
  12. 12.16 × 15 =
  13. 13.45 × 15 =
  14. 14.50 × 15 =
  15. 15.8 × 15 =
  16. 16.49 × 15 =
  17. 17.64 × 15 =
  18. 18.56 × 15 =
  19. 19.35 × 15 =
  20. 20.16 × 15 =
  21. 21.42 × 15 =
  22. 22.64 × 15 =
  23. 23.16 × 15 =
  24. 24.59 × 15 =
  25. 25.35 × 15 =
  26. 26.58 × 15 =
  27. 27.27 × 15 =
  28. 28.13 × 15 =
  29. 29.21 × 15 =
  30. 30.4 × 15 =
  31. 31.19 × 15 =
  32. 32.35 × 15 =
  33. 33.28 × 15 =
  34. 34.47 × 15 =
  35. 35.16 × 15 =
  36. 36.19 × 15 =
  37. 37.32 × 15 =
  38. 38.35 × 15 =
  39. 39.44 × 15 =
  40. 40.26 × 15 =

Answer key

  1. 300
  2. 600
  3. 825
  4. 675
  5. 495
  6. 180
  7. 210
  8. 660
  9. 795
  10. 945
  11. 945
  12. 240
  13. 675
  14. 750
  15. 120
  16. 735
  17. 960
  18. 840
  19. 525
  20. 240
  21. 630
  22. 960
  23. 240
  24. 885
  25. 525
  26. 870
  27. 405
  28. 195
  29. 315
  30. 60
  31. 285
  32. 525
  33. 420
  34. 705
  35. 240
  36. 285
  37. 480
  38. 525
  39. 660
  40. 390

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