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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 765 · 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. 1.32 × 15 =
  2. 2.54 × 15 =
  3. 3.6 × 15 =
  4. 4.44 × 15 =
  5. 5.5 × 15 =
  6. 6.35 × 15 =
  7. 7.8 × 15 =
  8. 8.27 × 15 =
  9. 9.52 × 15 =
  10. 10.18 × 15 =
  11. 11.32 × 15 =
  12. 12.13 × 15 =
  13. 13.61 × 15 =
  14. 14.53 × 15 =
  15. 15.14 × 15 =
  16. 16.29 × 15 =
  17. 17.13 × 15 =
  18. 18.29 × 15 =
  19. 19.23 × 15 =
  20. 20.24 × 15 =
  21. 21.9 × 15 =
  22. 22.13 × 15 =
  23. 23.55 × 15 =
  24. 24.28 × 15 =
  25. 25.39 × 15 =
  26. 26.29 × 15 =
  27. 27.60 × 15 =
  28. 28.25 × 15 =
  29. 29.48 × 15 =
  30. 30.54 × 15 =
  31. 31.47 × 15 =
  32. 32.62 × 15 =
  33. 33.4 × 15 =
  34. 34.15 × 15 =
  35. 35.31 × 15 =
  36. 36.34 × 15 =
  37. 37.45 × 15 =
  38. 38.41 × 15 =
  39. 39.28 × 15 =
  40. 40.49 × 15 =

Answer key

  1. 480
  2. 810
  3. 90
  4. 660
  5. 75
  6. 525
  7. 120
  8. 405
  9. 780
  10. 270
  11. 480
  12. 195
  13. 915
  14. 795
  15. 210
  16. 435
  17. 195
  18. 435
  19. 345
  20. 360
  21. 135
  22. 195
  23. 825
  24. 420
  25. 585
  26. 435
  27. 900
  28. 375
  29. 720
  30. 810
  31. 705
  32. 930
  33. 60
  34. 225
  35. 465
  36. 510
  37. 675
  38. 615
  39. 420
  40. 735

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