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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 276 · 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. 1.32 × 15 =
  2. 2.57 × 15 =
  3. 3.60 × 15 =
  4. 4.43 × 15 =
  5. 5.57 × 15 =
  6. 6.17 × 15 =
  7. 7.23 × 15 =
  8. 8.12 × 15 =
  9. 9.38 × 15 =
  10. 10.36 × 15 =
  11. 11.40 × 15 =
  12. 12.48 × 15 =
  13. 13.45 × 15 =
  14. 14.41 × 15 =
  15. 15.24 × 15 =
  16. 16.7 × 15 =
  17. 17.4 × 15 =
  18. 18.53 × 15 =
  19. 19.32 × 15 =
  20. 20.33 × 15 =
  21. 21.39 × 15 =
  22. 22.7 × 15 =
  23. 23.36 × 15 =
  24. 24.45 × 15 =
  25. 25.4 × 15 =
  26. 26.62 × 15 =
  27. 27.59 × 15 =
  28. 28.53 × 15 =
  29. 29.27 × 15 =
  30. 30.16 × 15 =
  31. 31.61 × 15 =
  32. 32.41 × 15 =
  33. 33.37 × 15 =
  34. 34.47 × 15 =
  35. 35.19 × 15 =
  36. 36.43 × 15 =
  37. 37.20 × 15 =
  38. 38.63 × 15 =
  39. 39.53 × 15 =
  40. 40.32 × 15 =

Answer key

  1. 480
  2. 855
  3. 900
  4. 645
  5. 855
  6. 255
  7. 345
  8. 180
  9. 570
  10. 540
  11. 600
  12. 720
  13. 675
  14. 615
  15. 360
  16. 105
  17. 60
  18. 795
  19. 480
  20. 495
  21. 585
  22. 105
  23. 540
  24. 675
  25. 60
  26. 930
  27. 885
  28. 795
  29. 405
  30. 240
  31. 915
  32. 615
  33. 555
  34. 705
  35. 285
  36. 645
  37. 300
  38. 945
  39. 795
  40. 480

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