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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 871 · 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. 1.22 × 15 =
  2. 2.35 × 15 =
  3. 3.50 × 15 =
  4. 4.50 × 15 =
  5. 5.41 × 15 =
  6. 6.23 × 15 =
  7. 7.62 × 15 =
  8. 8.62 × 15 =
  9. 9.50 × 15 =
  10. 10.10 × 15 =
  11. 11.39 × 15 =
  12. 12.18 × 15 =
  13. 13.30 × 15 =
  14. 14.55 × 15 =
  15. 15.41 × 15 =
  16. 16.17 × 15 =
  17. 17.13 × 15 =
  18. 18.62 × 15 =
  19. 19.54 × 15 =
  20. 20.60 × 15 =
  21. 21.8 × 15 =
  22. 22.48 × 15 =
  23. 23.29 × 15 =
  24. 24.10 × 15 =
  25. 25.4 × 15 =
  26. 26.58 × 15 =
  27. 27.47 × 15 =
  28. 28.7 × 15 =
  29. 29.46 × 15 =
  30. 30.55 × 15 =
  31. 31.59 × 15 =
  32. 32.24 × 15 =
  33. 33.64 × 15 =
  34. 34.51 × 15 =
  35. 35.63 × 15 =
  36. 36.34 × 15 =
  37. 37.29 × 15 =
  38. 38.27 × 15 =
  39. 39.45 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 330
  2. 525
  3. 750
  4. 750
  5. 615
  6. 345
  7. 930
  8. 930
  9. 750
  10. 150
  11. 585
  12. 270
  13. 450
  14. 825
  15. 615
  16. 255
  17. 195
  18. 930
  19. 810
  20. 900
  21. 120
  22. 720
  23. 435
  24. 150
  25. 60
  26. 870
  27. 705
  28. 105
  29. 690
  30. 825
  31. 885
  32. 360
  33. 960
  34. 765
  35. 945
  36. 510
  37. 435
  38. 405
  39. 675
  40. 300

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