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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 238 · 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. 1.47 × 15 =
  2. 2.63 × 15 =
  3. 3.5 × 15 =
  4. 4.53 × 15 =
  5. 5.34 × 15 =
  6. 6.62 × 15 =
  7. 7.42 × 15 =
  8. 8.40 × 15 =
  9. 9.42 × 15 =
  10. 10.16 × 15 =
  11. 11.4 × 15 =
  12. 12.7 × 15 =
  13. 13.45 × 15 =
  14. 14.33 × 15 =
  15. 15.6 × 15 =
  16. 16.33 × 15 =
  17. 17.46 × 15 =
  18. 18.10 × 15 =
  19. 19.22 × 15 =
  20. 20.11 × 15 =
  21. 21.35 × 15 =
  22. 22.37 × 15 =
  23. 23.40 × 15 =
  24. 24.21 × 15 =
  25. 25.58 × 15 =
  26. 26.47 × 15 =
  27. 27.19 × 15 =
  28. 28.41 × 15 =
  29. 29.29 × 15 =
  30. 30.19 × 15 =
  31. 31.54 × 15 =
  32. 32.12 × 15 =
  33. 33.59 × 15 =
  34. 34.56 × 15 =
  35. 35.27 × 15 =
  36. 36.16 × 15 =
  37. 37.25 × 15 =
  38. 38.12 × 15 =
  39. 39.20 × 15 =
  40. 40.28 × 15 =

Answer key

  1. 705
  2. 945
  3. 75
  4. 795
  5. 510
  6. 930
  7. 630
  8. 600
  9. 630
  10. 240
  11. 60
  12. 105
  13. 675
  14. 495
  15. 90
  16. 495
  17. 690
  18. 150
  19. 330
  20. 165
  21. 525
  22. 555
  23. 600
  24. 315
  25. 870
  26. 705
  27. 285
  28. 615
  29. 435
  30. 285
  31. 810
  32. 180
  33. 885
  34. 840
  35. 405
  36. 240
  37. 375
  38. 180
  39. 300
  40. 420

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