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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 38 · 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. 2.5 × 15 =
  3. 3.13 × 15 =
  4. 4.7 × 15 =
  5. 5.50 × 15 =
  6. 6.5 × 15 =
  7. 7.9 × 15 =
  8. 8.54 × 15 =
  9. 9.9 × 15 =
  10. 10.10 × 15 =
  11. 11.32 × 15 =
  12. 12.48 × 15 =
  13. 13.12 × 15 =
  14. 14.27 × 15 =
  15. 15.25 × 15 =
  16. 16.22 × 15 =
  17. 17.44 × 15 =
  18. 18.43 × 15 =
  19. 19.58 × 15 =
  20. 20.62 × 15 =
  21. 21.9 × 15 =
  22. 22.10 × 15 =
  23. 23.40 × 15 =
  24. 24.25 × 15 =
  25. 25.12 × 15 =
  26. 26.21 × 15 =
  27. 27.30 × 15 =
  28. 28.14 × 15 =
  29. 29.28 × 15 =
  30. 30.24 × 15 =
  31. 31.34 × 15 =
  32. 32.14 × 15 =
  33. 33.52 × 15 =
  34. 34.56 × 15 =
  35. 35.20 × 15 =
  36. 36.62 × 15 =
  37. 37.17 × 15 =
  38. 38.38 × 15 =
  39. 39.54 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 285
  2. 75
  3. 195
  4. 105
  5. 750
  6. 75
  7. 135
  8. 810
  9. 135
  10. 150
  11. 480
  12. 720
  13. 180
  14. 405
  15. 375
  16. 330
  17. 660
  18. 645
  19. 870
  20. 930
  21. 135
  22. 150
  23. 600
  24. 375
  25. 180
  26. 315
  27. 450
  28. 210
  29. 420
  30. 360
  31. 510
  32. 210
  33. 780
  34. 840
  35. 300
  36. 930
  37. 255
  38. 570
  39. 810
  40. 750

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