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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 151 · 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. 1.54 × 15 =
  2. 2.49 × 15 =
  3. 3.54 × 15 =
  4. 4.54 × 15 =
  5. 5.22 × 15 =
  6. 6.16 × 15 =
  7. 7.61 × 15 =
  8. 8.42 × 15 =
  9. 9.38 × 15 =
  10. 10.32 × 15 =
  11. 11.9 × 15 =
  12. 12.26 × 15 =
  13. 13.11 × 15 =
  14. 14.14 × 15 =
  15. 15.7 × 15 =
  16. 16.59 × 15 =
  17. 17.34 × 15 =
  18. 18.52 × 15 =
  19. 19.19 × 15 =
  20. 20.5 × 15 =
  21. 21.57 × 15 =
  22. 22.24 × 15 =
  23. 23.26 × 15 =
  24. 24.8 × 15 =
  25. 25.63 × 15 =
  26. 26.35 × 15 =
  27. 27.39 × 15 =
  28. 28.14 × 15 =
  29. 29.36 × 15 =
  30. 30.64 × 15 =
  31. 31.10 × 15 =
  32. 32.27 × 15 =
  33. 33.14 × 15 =
  34. 34.37 × 15 =
  35. 35.50 × 15 =
  36. 36.22 × 15 =
  37. 37.59 × 15 =
  38. 38.63 × 15 =
  39. 39.7 × 15 =
  40. 40.30 × 15 =

Answer key

  1. 810
  2. 735
  3. 810
  4. 810
  5. 330
  6. 240
  7. 915
  8. 630
  9. 570
  10. 480
  11. 135
  12. 390
  13. 165
  14. 210
  15. 105
  16. 885
  17. 510
  18. 780
  19. 285
  20. 75
  21. 855
  22. 360
  23. 390
  24. 120
  25. 945
  26. 525
  27. 585
  28. 210
  29. 540
  30. 960
  31. 150
  32. 405
  33. 210
  34. 555
  35. 750
  36. 330
  37. 885
  38. 945
  39. 105
  40. 450

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