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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 333 · 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. 1.58 × 15 =
  2. 2.11 × 15 =
  3. 3.62 × 15 =
  4. 4.55 × 15 =
  5. 5.8 × 15 =
  6. 6.23 × 15 =
  7. 7.59 × 15 =
  8. 8.38 × 15 =
  9. 9.17 × 15 =
  10. 10.53 × 15 =
  11. 11.13 × 15 =
  12. 12.8 × 15 =
  13. 13.27 × 15 =
  14. 14.37 × 15 =
  15. 15.48 × 15 =
  16. 16.34 × 15 =
  17. 17.36 × 15 =
  18. 18.59 × 15 =
  19. 19.38 × 15 =
  20. 20.58 × 15 =
  21. 21.20 × 15 =
  22. 22.15 × 15 =
  23. 23.24 × 15 =
  24. 24.37 × 15 =
  25. 25.36 × 15 =
  26. 26.42 × 15 =
  27. 27.46 × 15 =
  28. 28.33 × 15 =
  29. 29.23 × 15 =
  30. 30.38 × 15 =
  31. 31.13 × 15 =
  32. 32.64 × 15 =
  33. 33.14 × 15 =
  34. 34.30 × 15 =
  35. 35.17 × 15 =
  36. 36.15 × 15 =
  37. 37.37 × 15 =
  38. 38.64 × 15 =
  39. 39.18 × 15 =
  40. 40.48 × 15 =

Answer key

  1. 870
  2. 165
  3. 930
  4. 825
  5. 120
  6. 345
  7. 885
  8. 570
  9. 255
  10. 795
  11. 195
  12. 120
  13. 405
  14. 555
  15. 720
  16. 510
  17. 540
  18. 885
  19. 570
  20. 870
  21. 300
  22. 225
  23. 360
  24. 555
  25. 540
  26. 630
  27. 690
  28. 495
  29. 345
  30. 570
  31. 195
  32. 960
  33. 210
  34. 450
  35. 255
  36. 225
  37. 555
  38. 960
  39. 270
  40. 720

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