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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 411 · 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. 1.62 × 15 =
  2. 2.34 × 15 =
  3. 3.38 × 15 =
  4. 4.45 × 15 =
  5. 5.51 × 15 =
  6. 6.35 × 15 =
  7. 7.47 × 15 =
  8. 8.29 × 15 =
  9. 9.41 × 15 =
  10. 10.23 × 15 =
  11. 11.24 × 15 =
  12. 12.39 × 15 =
  13. 13.46 × 15 =
  14. 14.34 × 15 =
  15. 15.63 × 15 =
  16. 16.23 × 15 =
  17. 17.34 × 15 =
  18. 18.19 × 15 =
  19. 19.43 × 15 =
  20. 20.15 × 15 =
  21. 21.33 × 15 =
  22. 22.37 × 15 =
  23. 23.18 × 15 =
  24. 24.56 × 15 =
  25. 25.36 × 15 =
  26. 26.27 × 15 =
  27. 27.57 × 15 =
  28. 28.21 × 15 =
  29. 29.24 × 15 =
  30. 30.39 × 15 =
  31. 31.30 × 15 =
  32. 32.21 × 15 =
  33. 33.19 × 15 =
  34. 34.48 × 15 =
  35. 35.4 × 15 =
  36. 36.61 × 15 =
  37. 37.24 × 15 =
  38. 38.43 × 15 =
  39. 39.42 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 930
  2. 510
  3. 570
  4. 675
  5. 765
  6. 525
  7. 705
  8. 435
  9. 615
  10. 345
  11. 360
  12. 585
  13. 690
  14. 510
  15. 945
  16. 345
  17. 510
  18. 285
  19. 645
  20. 225
  21. 495
  22. 555
  23. 270
  24. 840
  25. 540
  26. 405
  27. 855
  28. 315
  29. 360
  30. 585
  31. 450
  32. 315
  33. 285
  34. 720
  35. 60
  36. 915
  37. 360
  38. 645
  39. 630
  40. 750

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