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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 93 · 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. 1.16 × 15 =
  2. 2.23 × 15 =
  3. 3.26 × 15 =
  4. 4.58 × 15 =
  5. 5.11 × 15 =
  6. 6.63 × 15 =
  7. 7.14 × 15 =
  8. 8.53 × 15 =
  9. 9.30 × 15 =
  10. 10.4 × 15 =
  11. 11.63 × 15 =
  12. 12.13 × 15 =
  13. 13.27 × 15 =
  14. 14.4 × 15 =
  15. 15.53 × 15 =
  16. 16.25 × 15 =
  17. 17.20 × 15 =
  18. 18.19 × 15 =
  19. 19.52 × 15 =
  20. 20.45 × 15 =
  21. 21.34 × 15 =
  22. 22.40 × 15 =
  23. 23.15 × 15 =
  24. 24.39 × 15 =
  25. 25.51 × 15 =
  26. 26.33 × 15 =
  27. 27.40 × 15 =
  28. 28.12 × 15 =
  29. 29.61 × 15 =
  30. 30.26 × 15 =
  31. 31.7 × 15 =
  32. 32.6 × 15 =
  33. 33.35 × 15 =
  34. 34.51 × 15 =
  35. 35.44 × 15 =
  36. 36.58 × 15 =
  37. 37.8 × 15 =
  38. 38.20 × 15 =
  39. 39.13 × 15 =
  40. 40.15 × 15 =

Answer key

  1. 240
  2. 345
  3. 390
  4. 870
  5. 165
  6. 945
  7. 210
  8. 795
  9. 450
  10. 60
  11. 945
  12. 195
  13. 405
  14. 60
  15. 795
  16. 375
  17. 300
  18. 285
  19. 780
  20. 675
  21. 510
  22. 600
  23. 225
  24. 585
  25. 765
  26. 495
  27. 600
  28. 180
  29. 915
  30. 390
  31. 105
  32. 90
  33. 525
  34. 765
  35. 660
  36. 870
  37. 120
  38. 300
  39. 195
  40. 225

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