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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 53 · 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. 1.12 × 15 =
  2. 2.26 × 15 =
  3. 3.31 × 15 =
  4. 4.62 × 15 =
  5. 5.56 × 15 =
  6. 6.37 × 15 =
  7. 7.41 × 15 =
  8. 8.54 × 15 =
  9. 9.18 × 15 =
  10. 10.30 × 15 =
  11. 11.50 × 15 =
  12. 12.43 × 15 =
  13. 13.10 × 15 =
  14. 14.27 × 15 =
  15. 15.6 × 15 =
  16. 16.6 × 15 =
  17. 17.6 × 15 =
  18. 18.54 × 15 =
  19. 19.61 × 15 =
  20. 20.54 × 15 =
  21. 21.26 × 15 =
  22. 22.35 × 15 =
  23. 23.59 × 15 =
  24. 24.16 × 15 =
  25. 25.38 × 15 =
  26. 26.28 × 15 =
  27. 27.33 × 15 =
  28. 28.32 × 15 =
  29. 29.20 × 15 =
  30. 30.5 × 15 =
  31. 31.39 × 15 =
  32. 32.23 × 15 =
  33. 33.46 × 15 =
  34. 34.12 × 15 =
  35. 35.21 × 15 =
  36. 36.12 × 15 =
  37. 37.19 × 15 =
  38. 38.51 × 15 =
  39. 39.54 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 180
  2. 390
  3. 465
  4. 930
  5. 840
  6. 555
  7. 615
  8. 810
  9. 270
  10. 450
  11. 750
  12. 645
  13. 150
  14. 405
  15. 90
  16. 90
  17. 90
  18. 810
  19. 915
  20. 810
  21. 390
  22. 525
  23. 885
  24. 240
  25. 570
  26. 420
  27. 495
  28. 480
  29. 300
  30. 75
  31. 585
  32. 345
  33. 690
  34. 180
  35. 315
  36. 180
  37. 285
  38. 765
  39. 810
  40. 75

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