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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 791 · 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. 1.38 × 15 =
  2. 2.48 × 15 =
  3. 3.37 × 15 =
  4. 4.4 × 15 =
  5. 5.42 × 15 =
  6. 6.44 × 15 =
  7. 7.40 × 15 =
  8. 8.49 × 15 =
  9. 9.13 × 15 =
  10. 10.43 × 15 =
  11. 11.29 × 15 =
  12. 12.55 × 15 =
  13. 13.12 × 15 =
  14. 14.63 × 15 =
  15. 15.24 × 15 =
  16. 16.25 × 15 =
  17. 17.41 × 15 =
  18. 18.26 × 15 =
  19. 19.20 × 15 =
  20. 20.5 × 15 =
  21. 21.14 × 15 =
  22. 22.44 × 15 =
  23. 23.20 × 15 =
  24. 24.43 × 15 =
  25. 25.14 × 15 =
  26. 26.15 × 15 =
  27. 27.27 × 15 =
  28. 28.49 × 15 =
  29. 29.51 × 15 =
  30. 30.44 × 15 =
  31. 31.14 × 15 =
  32. 32.48 × 15 =
  33. 33.17 × 15 =
  34. 34.8 × 15 =
  35. 35.11 × 15 =
  36. 36.23 × 15 =
  37. 37.59 × 15 =
  38. 38.36 × 15 =
  39. 39.36 × 15 =
  40. 40.34 × 15 =

Answer key

  1. 570
  2. 720
  3. 555
  4. 60
  5. 630
  6. 660
  7. 600
  8. 735
  9. 195
  10. 645
  11. 435
  12. 825
  13. 180
  14. 945
  15. 360
  16. 375
  17. 615
  18. 390
  19. 300
  20. 75
  21. 210
  22. 660
  23. 300
  24. 645
  25. 210
  26. 225
  27. 405
  28. 735
  29. 765
  30. 660
  31. 210
  32. 720
  33. 255
  34. 120
  35. 165
  36. 345
  37. 885
  38. 540
  39. 540
  40. 510

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