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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 921 · 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. 1.47 × 15 =
  2. 2.63 × 15 =
  3. 3.19 × 15 =
  4. 4.43 × 15 =
  5. 5.27 × 15 =
  6. 6.12 × 15 =
  7. 7.23 × 15 =
  8. 8.10 × 15 =
  9. 9.55 × 15 =
  10. 10.9 × 15 =
  11. 11.41 × 15 =
  12. 12.47 × 15 =
  13. 13.35 × 15 =
  14. 14.4 × 15 =
  15. 15.44 × 15 =
  16. 16.53 × 15 =
  17. 17.39 × 15 =
  18. 18.7 × 15 =
  19. 19.33 × 15 =
  20. 20.24 × 15 =
  21. 21.56 × 15 =
  22. 22.32 × 15 =
  23. 23.34 × 15 =
  24. 24.6 × 15 =
  25. 25.7 × 15 =
  26. 26.29 × 15 =
  27. 27.20 × 15 =
  28. 28.63 × 15 =
  29. 29.23 × 15 =
  30. 30.16 × 15 =
  31. 31.4 × 15 =
  32. 32.27 × 15 =
  33. 33.24 × 15 =
  34. 34.58 × 15 =
  35. 35.52 × 15 =
  36. 36.13 × 15 =
  37. 37.24 × 15 =
  38. 38.15 × 15 =
  39. 39.41 × 15 =
  40. 40.39 × 15 =

Answer key

  1. 705
  2. 945
  3. 285
  4. 645
  5. 405
  6. 180
  7. 345
  8. 150
  9. 825
  10. 135
  11. 615
  12. 705
  13. 525
  14. 60
  15. 660
  16. 795
  17. 585
  18. 105
  19. 495
  20. 360
  21. 840
  22. 480
  23. 510
  24. 90
  25. 105
  26. 435
  27. 300
  28. 945
  29. 345
  30. 240
  31. 60
  32. 405
  33. 360
  34. 870
  35. 780
  36. 195
  37. 360
  38. 225
  39. 615
  40. 585

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