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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 271 · 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. 1.48 × 15 =
  2. 2.27 × 15 =
  3. 3.25 × 15 =
  4. 4.40 × 15 =
  5. 5.52 × 15 =
  6. 6.19 × 15 =
  7. 7.25 × 15 =
  8. 8.42 × 15 =
  9. 9.64 × 15 =
  10. 10.37 × 15 =
  11. 11.32 × 15 =
  12. 12.33 × 15 =
  13. 13.53 × 15 =
  14. 14.16 × 15 =
  15. 15.13 × 15 =
  16. 16.26 × 15 =
  17. 17.18 × 15 =
  18. 18.7 × 15 =
  19. 19.47 × 15 =
  20. 20.12 × 15 =
  21. 21.9 × 15 =
  22. 22.12 × 15 =
  23. 23.25 × 15 =
  24. 24.11 × 15 =
  25. 25.58 × 15 =
  26. 26.4 × 15 =
  27. 27.36 × 15 =
  28. 28.4 × 15 =
  29. 29.7 × 15 =
  30. 30.8 × 15 =
  31. 31.44 × 15 =
  32. 32.8 × 15 =
  33. 33.46 × 15 =
  34. 34.7 × 15 =
  35. 35.26 × 15 =
  36. 36.54 × 15 =
  37. 37.11 × 15 =
  38. 38.19 × 15 =
  39. 39.6 × 15 =
  40. 40.10 × 15 =

Answer key

  1. 720
  2. 405
  3. 375
  4. 600
  5. 780
  6. 285
  7. 375
  8. 630
  9. 960
  10. 555
  11. 480
  12. 495
  13. 795
  14. 240
  15. 195
  16. 390
  17. 270
  18. 105
  19. 705
  20. 180
  21. 135
  22. 180
  23. 375
  24. 165
  25. 870
  26. 60
  27. 540
  28. 60
  29. 105
  30. 120
  31. 660
  32. 120
  33. 690
  34. 105
  35. 390
  36. 810
  37. 165
  38. 285
  39. 90
  40. 150

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