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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 517 · 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. 1.5 × 15 =
  2. 2.29 × 15 =
  3. 3.10 × 15 =
  4. 4.44 × 15 =
  5. 5.36 × 15 =
  6. 6.16 × 15 =
  7. 7.24 × 15 =
  8. 8.6 × 15 =
  9. 9.41 × 15 =
  10. 10.5 × 15 =
  11. 11.52 × 15 =
  12. 12.31 × 15 =
  13. 13.15 × 15 =
  14. 14.47 × 15 =
  15. 15.37 × 15 =
  16. 16.62 × 15 =
  17. 17.16 × 15 =
  18. 18.42 × 15 =
  19. 19.58 × 15 =
  20. 20.36 × 15 =
  21. 21.62 × 15 =
  22. 22.42 × 15 =
  23. 23.6 × 15 =
  24. 24.24 × 15 =
  25. 25.18 × 15 =
  26. 26.41 × 15 =
  27. 27.20 × 15 =
  28. 28.62 × 15 =
  29. 29.21 × 15 =
  30. 30.4 × 15 =
  31. 31.46 × 15 =
  32. 32.40 × 15 =
  33. 33.18 × 15 =
  34. 34.15 × 15 =
  35. 35.30 × 15 =
  36. 36.34 × 15 =
  37. 37.16 × 15 =
  38. 38.60 × 15 =
  39. 39.33 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 75
  2. 435
  3. 150
  4. 660
  5. 540
  6. 240
  7. 360
  8. 90
  9. 615
  10. 75
  11. 780
  12. 465
  13. 225
  14. 705
  15. 555
  16. 930
  17. 240
  18. 630
  19. 870
  20. 540
  21. 930
  22. 630
  23. 90
  24. 360
  25. 270
  26. 615
  27. 300
  28. 930
  29. 315
  30. 60
  31. 690
  32. 600
  33. 270
  34. 225
  35. 450
  36. 510
  37. 240
  38. 900
  39. 495
  40. 930

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