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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 393 · 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. 1.19 × 15 =
  2. 2.8 × 15 =
  3. 3.35 × 15 =
  4. 4.41 × 15 =
  5. 5.47 × 15 =
  6. 6.15 × 15 =
  7. 7.33 × 15 =
  8. 8.61 × 15 =
  9. 9.7 × 15 =
  10. 10.60 × 15 =
  11. 11.26 × 15 =
  12. 12.21 × 15 =
  13. 13.61 × 15 =
  14. 14.25 × 15 =
  15. 15.26 × 15 =
  16. 16.60 × 15 =
  17. 17.48 × 15 =
  18. 18.14 × 15 =
  19. 19.49 × 15 =
  20. 20.10 × 15 =
  21. 21.34 × 15 =
  22. 22.20 × 15 =
  23. 23.30 × 15 =
  24. 24.6 × 15 =
  25. 25.63 × 15 =
  26. 26.13 × 15 =
  27. 27.29 × 15 =
  28. 28.5 × 15 =
  29. 29.56 × 15 =
  30. 30.35 × 15 =
  31. 31.53 × 15 =
  32. 32.4 × 15 =
  33. 33.30 × 15 =
  34. 34.51 × 15 =
  35. 35.58 × 15 =
  36. 36.24 × 15 =
  37. 37.51 × 15 =
  38. 38.36 × 15 =
  39. 39.6 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 285
  2. 120
  3. 525
  4. 615
  5. 705
  6. 225
  7. 495
  8. 915
  9. 105
  10. 900
  11. 390
  12. 315
  13. 915
  14. 375
  15. 390
  16. 900
  17. 720
  18. 210
  19. 735
  20. 150
  21. 510
  22. 300
  23. 450
  24. 90
  25. 945
  26. 195
  27. 435
  28. 75
  29. 840
  30. 525
  31. 795
  32. 60
  33. 450
  34. 765
  35. 870
  36. 360
  37. 765
  38. 540
  39. 90
  40. 600

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