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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 460 · 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. 1.26 × 15 =
  2. 2.27 × 15 =
  3. 3.47 × 15 =
  4. 4.19 × 15 =
  5. 5.44 × 15 =
  6. 6.19 × 15 =
  7. 7.37 × 15 =
  8. 8.17 × 15 =
  9. 9.42 × 15 =
  10. 10.12 × 15 =
  11. 11.4 × 15 =
  12. 12.39 × 15 =
  13. 13.4 × 15 =
  14. 14.40 × 15 =
  15. 15.11 × 15 =
  16. 16.29 × 15 =
  17. 17.24 × 15 =
  18. 18.7 × 15 =
  19. 19.19 × 15 =
  20. 20.59 × 15 =
  21. 21.56 × 15 =
  22. 22.21 × 15 =
  23. 23.43 × 15 =
  24. 24.22 × 15 =
  25. 25.20 × 15 =
  26. 26.23 × 15 =
  27. 27.5 × 15 =
  28. 28.60 × 15 =
  29. 29.32 × 15 =
  30. 30.16 × 15 =
  31. 31.9 × 15 =
  32. 32.30 × 15 =
  33. 33.56 × 15 =
  34. 34.44 × 15 =
  35. 35.11 × 15 =
  36. 36.60 × 15 =
  37. 37.15 × 15 =
  38. 38.4 × 15 =
  39. 39.62 × 15 =
  40. 40.35 × 15 =

Answer key

  1. 390
  2. 405
  3. 705
  4. 285
  5. 660
  6. 285
  7. 555
  8. 255
  9. 630
  10. 180
  11. 60
  12. 585
  13. 60
  14. 600
  15. 165
  16. 435
  17. 360
  18. 105
  19. 285
  20. 885
  21. 840
  22. 315
  23. 645
  24. 330
  25. 300
  26. 345
  27. 75
  28. 900
  29. 480
  30. 240
  31. 135
  32. 450
  33. 840
  34. 660
  35. 165
  36. 900
  37. 225
  38. 60
  39. 930
  40. 525

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