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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 266 · 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. 1.16 × 15 =
  2. 2.15 × 15 =
  3. 3.24 × 15 =
  4. 4.9 × 15 =
  5. 5.44 × 15 =
  6. 6.5 × 15 =
  7. 7.5 × 15 =
  8. 8.35 × 15 =
  9. 9.24 × 15 =
  10. 10.31 × 15 =
  11. 11.4 × 15 =
  12. 12.60 × 15 =
  13. 13.14 × 15 =
  14. 14.14 × 15 =
  15. 15.14 × 15 =
  16. 16.7 × 15 =
  17. 17.9 × 15 =
  18. 18.16 × 15 =
  19. 19.51 × 15 =
  20. 20.60 × 15 =
  21. 21.37 × 15 =
  22. 22.64 × 15 =
  23. 23.8 × 15 =
  24. 24.26 × 15 =
  25. 25.20 × 15 =
  26. 26.48 × 15 =
  27. 27.10 × 15 =
  28. 28.13 × 15 =
  29. 29.58 × 15 =
  30. 30.63 × 15 =
  31. 31.56 × 15 =
  32. 32.45 × 15 =
  33. 33.22 × 15 =
  34. 34.38 × 15 =
  35. 35.59 × 15 =
  36. 36.55 × 15 =
  37. 37.37 × 15 =
  38. 38.17 × 15 =
  39. 39.5 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 240
  2. 225
  3. 360
  4. 135
  5. 660
  6. 75
  7. 75
  8. 525
  9. 360
  10. 465
  11. 60
  12. 900
  13. 210
  14. 210
  15. 210
  16. 105
  17. 135
  18. 240
  19. 765
  20. 900
  21. 555
  22. 960
  23. 120
  24. 390
  25. 300
  26. 720
  27. 150
  28. 195
  29. 870
  30. 945
  31. 840
  32. 675
  33. 330
  34. 570
  35. 885
  36. 825
  37. 555
  38. 255
  39. 75
  40. 270

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