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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 50 · 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. 2.8 × 15 =
  3. 3.58 × 15 =
  4. 4.6 × 15 =
  5. 5.16 × 15 =
  6. 6.4 × 15 =
  7. 7.54 × 15 =
  8. 8.4 × 15 =
  9. 9.7 × 15 =
  10. 10.21 × 15 =
  11. 11.27 × 15 =
  12. 12.53 × 15 =
  13. 13.27 × 15 =
  14. 14.14 × 15 =
  15. 15.8 × 15 =
  16. 16.21 × 15 =
  17. 17.40 × 15 =
  18. 18.14 × 15 =
  19. 19.11 × 15 =
  20. 20.46 × 15 =
  21. 21.57 × 15 =
  22. 22.21 × 15 =
  23. 23.25 × 15 =
  24. 24.21 × 15 =
  25. 25.30 × 15 =
  26. 26.20 × 15 =
  27. 27.32 × 15 =
  28. 28.47 × 15 =
  29. 29.24 × 15 =
  30. 30.18 × 15 =
  31. 31.46 × 15 =
  32. 32.31 × 15 =
  33. 33.56 × 15 =
  34. 34.7 × 15 =
  35. 35.22 × 15 =
  36. 36.56 × 15 =
  37. 37.31 × 15 =
  38. 38.64 × 15 =
  39. 39.26 × 15 =
  40. 40.34 × 15 =

Answer key

  1. 285
  2. 120
  3. 870
  4. 90
  5. 240
  6. 60
  7. 810
  8. 60
  9. 105
  10. 315
  11. 405
  12. 795
  13. 405
  14. 210
  15. 120
  16. 315
  17. 600
  18. 210
  19. 165
  20. 690
  21. 855
  22. 315
  23. 375
  24. 315
  25. 450
  26. 300
  27. 480
  28. 705
  29. 360
  30. 270
  31. 690
  32. 465
  33. 840
  34. 105
  35. 330
  36. 840
  37. 465
  38. 960
  39. 390
  40. 510

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