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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 282 · 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. 1.29 × 15 =
  2. 2.28 × 15 =
  3. 3.29 × 15 =
  4. 4.46 × 15 =
  5. 5.52 × 15 =
  6. 6.63 × 15 =
  7. 7.49 × 15 =
  8. 8.15 × 15 =
  9. 9.46 × 15 =
  10. 10.41 × 15 =
  11. 11.28 × 15 =
  12. 12.55 × 15 =
  13. 13.27 × 15 =
  14. 14.16 × 15 =
  15. 15.17 × 15 =
  16. 16.37 × 15 =
  17. 17.29 × 15 =
  18. 18.21 × 15 =
  19. 19.62 × 15 =
  20. 20.21 × 15 =
  21. 21.60 × 15 =
  22. 22.13 × 15 =
  23. 23.44 × 15 =
  24. 24.31 × 15 =
  25. 25.13 × 15 =
  26. 26.24 × 15 =
  27. 27.41 × 15 =
  28. 28.34 × 15 =
  29. 29.59 × 15 =
  30. 30.16 × 15 =
  31. 31.53 × 15 =
  32. 32.33 × 15 =
  33. 33.4 × 15 =
  34. 34.5 × 15 =
  35. 35.49 × 15 =
  36. 36.52 × 15 =
  37. 37.29 × 15 =
  38. 38.20 × 15 =
  39. 39.6 × 15 =
  40. 40.36 × 15 =

Answer key

  1. 435
  2. 420
  3. 435
  4. 690
  5. 780
  6. 945
  7. 735
  8. 225
  9. 690
  10. 615
  11. 420
  12. 825
  13. 405
  14. 240
  15. 255
  16. 555
  17. 435
  18. 315
  19. 930
  20. 315
  21. 900
  22. 195
  23. 660
  24. 465
  25. 195
  26. 360
  27. 615
  28. 510
  29. 885
  30. 240
  31. 795
  32. 495
  33. 60
  34. 75
  35. 735
  36. 780
  37. 435
  38. 300
  39. 90
  40. 540

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