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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 580 · 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. 1.26 × 15 =
  2. 2.4 × 15 =
  3. 3.58 × 15 =
  4. 4.57 × 15 =
  5. 5.6 × 15 =
  6. 6.15 × 15 =
  7. 7.32 × 15 =
  8. 8.41 × 15 =
  9. 9.5 × 15 =
  10. 10.16 × 15 =
  11. 11.42 × 15 =
  12. 12.55 × 15 =
  13. 13.26 × 15 =
  14. 14.7 × 15 =
  15. 15.49 × 15 =
  16. 16.10 × 15 =
  17. 17.47 × 15 =
  18. 18.41 × 15 =
  19. 19.9 × 15 =
  20. 20.59 × 15 =
  21. 21.14 × 15 =
  22. 22.24 × 15 =
  23. 23.44 × 15 =
  24. 24.45 × 15 =
  25. 25.41 × 15 =
  26. 26.34 × 15 =
  27. 27.60 × 15 =
  28. 28.47 × 15 =
  29. 29.29 × 15 =
  30. 30.8 × 15 =
  31. 31.42 × 15 =
  32. 32.28 × 15 =
  33. 33.7 × 15 =
  34. 34.33 × 15 =
  35. 35.41 × 15 =
  36. 36.41 × 15 =
  37. 37.28 × 15 =
  38. 38.14 × 15 =
  39. 39.17 × 15 =
  40. 40.61 × 15 =

Answer key

  1. 390
  2. 60
  3. 870
  4. 855
  5. 90
  6. 225
  7. 480
  8. 615
  9. 75
  10. 240
  11. 630
  12. 825
  13. 390
  14. 105
  15. 735
  16. 150
  17. 705
  18. 615
  19. 135
  20. 885
  21. 210
  22. 360
  23. 660
  24. 675
  25. 615
  26. 510
  27. 900
  28. 705
  29. 435
  30. 120
  31. 630
  32. 420
  33. 105
  34. 495
  35. 615
  36. 615
  37. 420
  38. 210
  39. 255
  40. 915

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