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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 105 · 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. 1.47 × 15 =
  2. 2.52 × 15 =
  3. 3.54 × 15 =
  4. 4.39 × 15 =
  5. 5.58 × 15 =
  6. 6.32 × 15 =
  7. 7.44 × 15 =
  8. 8.19 × 15 =
  9. 9.31 × 15 =
  10. 10.56 × 15 =
  11. 11.28 × 15 =
  12. 12.25 × 15 =
  13. 13.47 × 15 =
  14. 14.4 × 15 =
  15. 15.39 × 15 =
  16. 16.20 × 15 =
  17. 17.27 × 15 =
  18. 18.16 × 15 =
  19. 19.26 × 15 =
  20. 20.54 × 15 =
  21. 21.36 × 15 =
  22. 22.18 × 15 =
  23. 23.11 × 15 =
  24. 24.51 × 15 =
  25. 25.10 × 15 =
  26. 26.5 × 15 =
  27. 27.17 × 15 =
  28. 28.49 × 15 =
  29. 29.5 × 15 =
  30. 30.28 × 15 =
  31. 31.19 × 15 =
  32. 32.30 × 15 =
  33. 33.21 × 15 =
  34. 34.19 × 15 =
  35. 35.32 × 15 =
  36. 36.46 × 15 =
  37. 37.14 × 15 =
  38. 38.47 × 15 =
  39. 39.33 × 15 =
  40. 40.61 × 15 =

Answer key

  1. 705
  2. 780
  3. 810
  4. 585
  5. 870
  6. 480
  7. 660
  8. 285
  9. 465
  10. 840
  11. 420
  12. 375
  13. 705
  14. 60
  15. 585
  16. 300
  17. 405
  18. 240
  19. 390
  20. 810
  21. 540
  22. 270
  23. 165
  24. 765
  25. 150
  26. 75
  27. 255
  28. 735
  29. 75
  30. 420
  31. 285
  32. 450
  33. 315
  34. 285
  35. 480
  36. 690
  37. 210
  38. 705
  39. 495
  40. 915

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