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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 776 · 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. 1.34 × 15 =
  2. 2.46 × 15 =
  3. 3.32 × 15 =
  4. 4.22 × 15 =
  5. 5.29 × 15 =
  6. 6.31 × 15 =
  7. 7.19 × 15 =
  8. 8.31 × 15 =
  9. 9.10 × 15 =
  10. 10.64 × 15 =
  11. 11.37 × 15 =
  12. 12.53 × 15 =
  13. 13.29 × 15 =
  14. 14.6 × 15 =
  15. 15.30 × 15 =
  16. 16.46 × 15 =
  17. 17.48 × 15 =
  18. 18.39 × 15 =
  19. 19.32 × 15 =
  20. 20.8 × 15 =
  21. 21.39 × 15 =
  22. 22.51 × 15 =
  23. 23.7 × 15 =
  24. 24.17 × 15 =
  25. 25.37 × 15 =
  26. 26.21 × 15 =
  27. 27.38 × 15 =
  28. 28.13 × 15 =
  29. 29.55 × 15 =
  30. 30.62 × 15 =
  31. 31.16 × 15 =
  32. 32.7 × 15 =
  33. 33.15 × 15 =
  34. 34.17 × 15 =
  35. 35.7 × 15 =
  36. 36.31 × 15 =
  37. 37.30 × 15 =
  38. 38.33 × 15 =
  39. 39.6 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 510
  2. 690
  3. 480
  4. 330
  5. 435
  6. 465
  7. 285
  8. 465
  9. 150
  10. 960
  11. 555
  12. 795
  13. 435
  14. 90
  15. 450
  16. 690
  17. 720
  18. 585
  19. 480
  20. 120
  21. 585
  22. 765
  23. 105
  24. 255
  25. 555
  26. 315
  27. 570
  28. 195
  29. 825
  30. 930
  31. 240
  32. 105
  33. 225
  34. 255
  35. 105
  36. 465
  37. 450
  38. 495
  39. 90
  40. 600

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