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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 129 · 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. 1.36 × 15 =
  2. 2.20 × 15 =
  3. 3.56 × 15 =
  4. 4.30 × 15 =
  5. 5.8 × 15 =
  6. 6.7 × 15 =
  7. 7.15 × 15 =
  8. 8.59 × 15 =
  9. 9.27 × 15 =
  10. 10.5 × 15 =
  11. 11.20 × 15 =
  12. 12.25 × 15 =
  13. 13.14 × 15 =
  14. 14.56 × 15 =
  15. 15.53 × 15 =
  16. 16.54 × 15 =
  17. 17.60 × 15 =
  18. 18.59 × 15 =
  19. 19.39 × 15 =
  20. 20.53 × 15 =
  21. 21.51 × 15 =
  22. 22.13 × 15 =
  23. 23.26 × 15 =
  24. 24.52 × 15 =
  25. 25.53 × 15 =
  26. 26.17 × 15 =
  27. 27.18 × 15 =
  28. 28.51 × 15 =
  29. 29.59 × 15 =
  30. 30.22 × 15 =
  31. 31.30 × 15 =
  32. 32.39 × 15 =
  33. 33.20 × 15 =
  34. 34.59 × 15 =
  35. 35.35 × 15 =
  36. 36.47 × 15 =
  37. 37.20 × 15 =
  38. 38.34 × 15 =
  39. 39.36 × 15 =
  40. 40.31 × 15 =

Answer key

  1. 540
  2. 300
  3. 840
  4. 450
  5. 120
  6. 105
  7. 225
  8. 885
  9. 405
  10. 75
  11. 300
  12. 375
  13. 210
  14. 840
  15. 795
  16. 810
  17. 900
  18. 885
  19. 585
  20. 795
  21. 765
  22. 195
  23. 390
  24. 780
  25. 795
  26. 255
  27. 270
  28. 765
  29. 885
  30. 330
  31. 450
  32. 585
  33. 300
  34. 885
  35. 525
  36. 705
  37. 300
  38. 510
  39. 540
  40. 465

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