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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 651 · 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. 2.14 × 15 =
  3. 3.34 × 15 =
  4. 4.5 × 15 =
  5. 5.14 × 15 =
  6. 6.12 × 15 =
  7. 7.54 × 15 =
  8. 8.48 × 15 =
  9. 9.47 × 15 =
  10. 10.62 × 15 =
  11. 11.63 × 15 =
  12. 12.8 × 15 =
  13. 13.49 × 15 =
  14. 14.8 × 15 =
  15. 15.56 × 15 =
  16. 16.59 × 15 =
  17. 17.30 × 15 =
  18. 18.10 × 15 =
  19. 19.15 × 15 =
  20. 20.56 × 15 =
  21. 21.56 × 15 =
  22. 22.46 × 15 =
  23. 23.24 × 15 =
  24. 24.30 × 15 =
  25. 25.23 × 15 =
  26. 26.27 × 15 =
  27. 27.27 × 15 =
  28. 28.23 × 15 =
  29. 29.16 × 15 =
  30. 30.22 × 15 =
  31. 31.28 × 15 =
  32. 32.51 × 15 =
  33. 33.18 × 15 =
  34. 34.8 × 15 =
  35. 35.56 × 15 =
  36. 36.39 × 15 =
  37. 37.6 × 15 =
  38. 38.4 × 15 =
  39. 39.49 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 180
  2. 210
  3. 510
  4. 75
  5. 210
  6. 180
  7. 810
  8. 720
  9. 705
  10. 930
  11. 945
  12. 120
  13. 735
  14. 120
  15. 840
  16. 885
  17. 450
  18. 150
  19. 225
  20. 840
  21. 840
  22. 690
  23. 360
  24. 450
  25. 345
  26. 405
  27. 405
  28. 345
  29. 240
  30. 330
  31. 420
  32. 765
  33. 270
  34. 120
  35. 840
  36. 585
  37. 90
  38. 60
  39. 735
  40. 300

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