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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 766 · 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. 1.33 × 15 =
  2. 2.29 × 15 =
  3. 3.7 × 15 =
  4. 4.50 × 15 =
  5. 5.22 × 15 =
  6. 6.28 × 15 =
  7. 7.20 × 15 =
  8. 8.34 × 15 =
  9. 9.46 × 15 =
  10. 10.34 × 15 =
  11. 11.10 × 15 =
  12. 12.38 × 15 =
  13. 13.31 × 15 =
  14. 14.60 × 15 =
  15. 15.47 × 15 =
  16. 16.23 × 15 =
  17. 17.9 × 15 =
  18. 18.31 × 15 =
  19. 19.20 × 15 =
  20. 20.50 × 15 =
  21. 21.24 × 15 =
  22. 22.15 × 15 =
  23. 23.63 × 15 =
  24. 24.15 × 15 =
  25. 25.50 × 15 =
  26. 26.10 × 15 =
  27. 27.18 × 15 =
  28. 28.35 × 15 =
  29. 29.50 × 15 =
  30. 30.41 × 15 =
  31. 31.24 × 15 =
  32. 32.14 × 15 =
  33. 33.10 × 15 =
  34. 34.64 × 15 =
  35. 35.10 × 15 =
  36. 36.35 × 15 =
  37. 37.17 × 15 =
  38. 38.14 × 15 =
  39. 39.61 × 15 =
  40. 40.16 × 15 =

Answer key

  1. 495
  2. 435
  3. 105
  4. 750
  5. 330
  6. 420
  7. 300
  8. 510
  9. 690
  10. 510
  11. 150
  12. 570
  13. 465
  14. 900
  15. 705
  16. 345
  17. 135
  18. 465
  19. 300
  20. 750
  21. 360
  22. 225
  23. 945
  24. 225
  25. 750
  26. 150
  27. 270
  28. 525
  29. 750
  30. 615
  31. 360
  32. 210
  33. 150
  34. 960
  35. 150
  36. 525
  37. 255
  38. 210
  39. 915
  40. 240

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