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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 927 · 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. 1.21 × 15 =
  2. 2.15 × 15 =
  3. 3.53 × 15 =
  4. 4.56 × 15 =
  5. 5.27 × 15 =
  6. 6.44 × 15 =
  7. 7.10 × 15 =
  8. 8.42 × 15 =
  9. 9.19 × 15 =
  10. 10.32 × 15 =
  11. 11.14 × 15 =
  12. 12.36 × 15 =
  13. 13.47 × 15 =
  14. 14.18 × 15 =
  15. 15.56 × 15 =
  16. 16.4 × 15 =
  17. 17.64 × 15 =
  18. 18.29 × 15 =
  19. 19.34 × 15 =
  20. 20.35 × 15 =
  21. 21.10 × 15 =
  22. 22.5 × 15 =
  23. 23.61 × 15 =
  24. 24.22 × 15 =
  25. 25.18 × 15 =
  26. 26.7 × 15 =
  27. 27.25 × 15 =
  28. 28.34 × 15 =
  29. 29.12 × 15 =
  30. 30.6 × 15 =
  31. 31.46 × 15 =
  32. 32.17 × 15 =
  33. 33.32 × 15 =
  34. 34.12 × 15 =
  35. 35.16 × 15 =
  36. 36.19 × 15 =
  37. 37.19 × 15 =
  38. 38.12 × 15 =
  39. 39.21 × 15 =
  40. 40.28 × 15 =

Answer key

  1. 315
  2. 225
  3. 795
  4. 840
  5. 405
  6. 660
  7. 150
  8. 630
  9. 285
  10. 480
  11. 210
  12. 540
  13. 705
  14. 270
  15. 840
  16. 60
  17. 960
  18. 435
  19. 510
  20. 525
  21. 150
  22. 75
  23. 915
  24. 330
  25. 270
  26. 105
  27. 375
  28. 510
  29. 180
  30. 90
  31. 690
  32. 255
  33. 480
  34. 180
  35. 240
  36. 285
  37. 285
  38. 180
  39. 315
  40. 420

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