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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 579 · 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. 2.40 × 15 =
  3. 3.22 × 15 =
  4. 4.8 × 15 =
  5. 5.62 × 15 =
  6. 6.49 × 15 =
  7. 7.16 × 15 =
  8. 8.33 × 15 =
  9. 9.56 × 15 =
  10. 10.23 × 15 =
  11. 11.12 × 15 =
  12. 12.41 × 15 =
  13. 13.35 × 15 =
  14. 14.36 × 15 =
  15. 15.45 × 15 =
  16. 16.32 × 15 =
  17. 17.27 × 15 =
  18. 18.59 × 15 =
  19. 19.64 × 15 =
  20. 20.20 × 15 =
  21. 21.49 × 15 =
  22. 22.29 × 15 =
  23. 23.52 × 15 =
  24. 24.45 × 15 =
  25. 25.6 × 15 =
  26. 26.4 × 15 =
  27. 27.34 × 15 =
  28. 28.43 × 15 =
  29. 29.44 × 15 =
  30. 30.56 × 15 =
  31. 31.30 × 15 =
  32. 32.39 × 15 =
  33. 33.13 × 15 =
  34. 34.7 × 15 =
  35. 35.7 × 15 =
  36. 36.7 × 15 =
  37. 37.48 × 15 =
  38. 38.20 × 15 =
  39. 39.63 × 15 =
  40. 40.23 × 15 =

Answer key

  1. 510
  2. 600
  3. 330
  4. 120
  5. 930
  6. 735
  7. 240
  8. 495
  9. 840
  10. 345
  11. 180
  12. 615
  13. 525
  14. 540
  15. 675
  16. 480
  17. 405
  18. 885
  19. 960
  20. 300
  21. 735
  22. 435
  23. 780
  24. 675
  25. 90
  26. 60
  27. 510
  28. 645
  29. 660
  30. 840
  31. 450
  32. 585
  33. 195
  34. 105
  35. 105
  36. 105
  37. 720
  38. 300
  39. 945
  40. 345

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