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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 281 · 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. 1.39 × 15 =
  2. 2.60 × 15 =
  3. 3.27 × 15 =
  4. 4.56 × 15 =
  5. 5.41 × 15 =
  6. 6.44 × 15 =
  7. 7.38 × 15 =
  8. 8.63 × 15 =
  9. 9.4 × 15 =
  10. 10.14 × 15 =
  11. 11.32 × 15 =
  12. 12.12 × 15 =
  13. 13.12 × 15 =
  14. 14.35 × 15 =
  15. 15.8 × 15 =
  16. 16.35 × 15 =
  17. 17.11 × 15 =
  18. 18.14 × 15 =
  19. 19.19 × 15 =
  20. 20.20 × 15 =
  21. 21.6 × 15 =
  22. 22.58 × 15 =
  23. 23.58 × 15 =
  24. 24.30 × 15 =
  25. 25.33 × 15 =
  26. 26.27 × 15 =
  27. 27.61 × 15 =
  28. 28.44 × 15 =
  29. 29.36 × 15 =
  30. 30.38 × 15 =
  31. 31.8 × 15 =
  32. 32.58 × 15 =
  33. 33.41 × 15 =
  34. 34.20 × 15 =
  35. 35.54 × 15 =
  36. 36.23 × 15 =
  37. 37.48 × 15 =
  38. 38.19 × 15 =
  39. 39.24 × 15 =
  40. 40.17 × 15 =

Answer key

  1. 585
  2. 900
  3. 405
  4. 840
  5. 615
  6. 660
  7. 570
  8. 945
  9. 60
  10. 210
  11. 480
  12. 180
  13. 180
  14. 525
  15. 120
  16. 525
  17. 165
  18. 210
  19. 285
  20. 300
  21. 90
  22. 870
  23. 870
  24. 450
  25. 495
  26. 405
  27. 915
  28. 660
  29. 540
  30. 570
  31. 120
  32. 870
  33. 615
  34. 300
  35. 810
  36. 345
  37. 720
  38. 285
  39. 360
  40. 255

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