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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 535 · 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. 1.12 × 15 =
  2. 2.51 × 15 =
  3. 3.64 × 15 =
  4. 4.19 × 15 =
  5. 5.31 × 15 =
  6. 6.39 × 15 =
  7. 7.60 × 15 =
  8. 8.14 × 15 =
  9. 9.45 × 15 =
  10. 10.29 × 15 =
  11. 11.24 × 15 =
  12. 12.55 × 15 =
  13. 13.19 × 15 =
  14. 14.48 × 15 =
  15. 15.10 × 15 =
  16. 16.19 × 15 =
  17. 17.20 × 15 =
  18. 18.5 × 15 =
  19. 19.20 × 15 =
  20. 20.61 × 15 =
  21. 21.60 × 15 =
  22. 22.58 × 15 =
  23. 23.14 × 15 =
  24. 24.44 × 15 =
  25. 25.6 × 15 =
  26. 26.39 × 15 =
  27. 27.44 × 15 =
  28. 28.52 × 15 =
  29. 29.11 × 15 =
  30. 30.20 × 15 =
  31. 31.45 × 15 =
  32. 32.43 × 15 =
  33. 33.22 × 15 =
  34. 34.51 × 15 =
  35. 35.58 × 15 =
  36. 36.42 × 15 =
  37. 37.62 × 15 =
  38. 38.21 × 15 =
  39. 39.53 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 180
  2. 765
  3. 960
  4. 285
  5. 465
  6. 585
  7. 900
  8. 210
  9. 675
  10. 435
  11. 360
  12. 825
  13. 285
  14. 720
  15. 150
  16. 285
  17. 300
  18. 75
  19. 300
  20. 915
  21. 900
  22. 870
  23. 210
  24. 660
  25. 90
  26. 585
  27. 660
  28. 780
  29. 165
  30. 300
  31. 675
  32. 645
  33. 330
  34. 765
  35. 870
  36. 630
  37. 930
  38. 315
  39. 795
  40. 300

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