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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 733 · 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. 1.43 × 15 =
  2. 2.52 × 15 =
  3. 3.45 × 15 =
  4. 4.44 × 15 =
  5. 5.50 × 15 =
  6. 6.34 × 15 =
  7. 7.57 × 15 =
  8. 8.54 × 15 =
  9. 9.15 × 15 =
  10. 10.22 × 15 =
  11. 11.7 × 15 =
  12. 12.5 × 15 =
  13. 13.36 × 15 =
  14. 14.24 × 15 =
  15. 15.19 × 15 =
  16. 16.27 × 15 =
  17. 17.30 × 15 =
  18. 18.31 × 15 =
  19. 19.21 × 15 =
  20. 20.48 × 15 =
  21. 21.6 × 15 =
  22. 22.27 × 15 =
  23. 23.47 × 15 =
  24. 24.19 × 15 =
  25. 25.16 × 15 =
  26. 26.8 × 15 =
  27. 27.59 × 15 =
  28. 28.29 × 15 =
  29. 29.48 × 15 =
  30. 30.7 × 15 =
  31. 31.5 × 15 =
  32. 32.17 × 15 =
  33. 33.12 × 15 =
  34. 34.37 × 15 =
  35. 35.64 × 15 =
  36. 36.47 × 15 =
  37. 37.12 × 15 =
  38. 38.36 × 15 =
  39. 39.45 × 15 =
  40. 40.13 × 15 =

Answer key

  1. 645
  2. 780
  3. 675
  4. 660
  5. 750
  6. 510
  7. 855
  8. 810
  9. 225
  10. 330
  11. 105
  12. 75
  13. 540
  14. 360
  15. 285
  16. 405
  17. 450
  18. 465
  19. 315
  20. 720
  21. 90
  22. 405
  23. 705
  24. 285
  25. 240
  26. 120
  27. 885
  28. 435
  29. 720
  30. 105
  31. 75
  32. 255
  33. 180
  34. 555
  35. 960
  36. 705
  37. 180
  38. 540
  39. 675
  40. 195

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