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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 727 · 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. 1.46 × 15 =
  2. 2.39 × 15 =
  3. 3.52 × 15 =
  4. 4.58 × 15 =
  5. 5.56 × 15 =
  6. 6.32 × 15 =
  7. 7.12 × 15 =
  8. 8.30 × 15 =
  9. 9.45 × 15 =
  10. 10.38 × 15 =
  11. 11.54 × 15 =
  12. 12.21 × 15 =
  13. 13.11 × 15 =
  14. 14.30 × 15 =
  15. 15.41 × 15 =
  16. 16.60 × 15 =
  17. 17.57 × 15 =
  18. 18.27 × 15 =
  19. 19.49 × 15 =
  20. 20.45 × 15 =
  21. 21.10 × 15 =
  22. 22.15 × 15 =
  23. 23.40 × 15 =
  24. 24.35 × 15 =
  25. 25.45 × 15 =
  26. 26.11 × 15 =
  27. 27.13 × 15 =
  28. 28.52 × 15 =
  29. 29.52 × 15 =
  30. 30.5 × 15 =
  31. 31.55 × 15 =
  32. 32.23 × 15 =
  33. 33.60 × 15 =
  34. 34.33 × 15 =
  35. 35.47 × 15 =
  36. 36.63 × 15 =
  37. 37.29 × 15 =
  38. 38.12 × 15 =
  39. 39.18 × 15 =
  40. 40.24 × 15 =

Answer key

  1. 690
  2. 585
  3. 780
  4. 870
  5. 840
  6. 480
  7. 180
  8. 450
  9. 675
  10. 570
  11. 810
  12. 315
  13. 165
  14. 450
  15. 615
  16. 900
  17. 855
  18. 405
  19. 735
  20. 675
  21. 150
  22. 225
  23. 600
  24. 525
  25. 675
  26. 165
  27. 195
  28. 780
  29. 780
  30. 75
  31. 825
  32. 345
  33. 900
  34. 495
  35. 705
  36. 945
  37. 435
  38. 180
  39. 270
  40. 360

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