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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 903 · 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. 1.29 × 15 =
  2. 2.30 × 15 =
  3. 3.30 × 15 =
  4. 4.28 × 15 =
  5. 5.47 × 15 =
  6. 6.11 × 15 =
  7. 7.28 × 15 =
  8. 8.9 × 15 =
  9. 9.26 × 15 =
  10. 10.58 × 15 =
  11. 11.27 × 15 =
  12. 12.35 × 15 =
  13. 13.45 × 15 =
  14. 14.59 × 15 =
  15. 15.40 × 15 =
  16. 16.52 × 15 =
  17. 17.16 × 15 =
  18. 18.55 × 15 =
  19. 19.50 × 15 =
  20. 20.23 × 15 =
  21. 21.47 × 15 =
  22. 22.35 × 15 =
  23. 23.48 × 15 =
  24. 24.32 × 15 =
  25. 25.22 × 15 =
  26. 26.64 × 15 =
  27. 27.11 × 15 =
  28. 28.15 × 15 =
  29. 29.5 × 15 =
  30. 30.21 × 15 =
  31. 31.39 × 15 =
  32. 32.47 × 15 =
  33. 33.37 × 15 =
  34. 34.34 × 15 =
  35. 35.40 × 15 =
  36. 36.45 × 15 =
  37. 37.54 × 15 =
  38. 38.20 × 15 =
  39. 39.27 × 15 =
  40. 40.61 × 15 =

Answer key

  1. 435
  2. 450
  3. 450
  4. 420
  5. 705
  6. 165
  7. 420
  8. 135
  9. 390
  10. 870
  11. 405
  12. 525
  13. 675
  14. 885
  15. 600
  16. 780
  17. 240
  18. 825
  19. 750
  20. 345
  21. 705
  22. 525
  23. 720
  24. 480
  25. 330
  26. 960
  27. 165
  28. 225
  29. 75
  30. 315
  31. 585
  32. 705
  33. 555
  34. 510
  35. 600
  36. 675
  37. 810
  38. 300
  39. 405
  40. 915

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