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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 656 · 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. 1.52 × 15 =
  2. 2.9 × 15 =
  3. 3.63 × 15 =
  4. 4.29 × 15 =
  5. 5.58 × 15 =
  6. 6.27 × 15 =
  7. 7.37 × 15 =
  8. 8.62 × 15 =
  9. 9.44 × 15 =
  10. 10.12 × 15 =
  11. 11.20 × 15 =
  12. 12.19 × 15 =
  13. 13.5 × 15 =
  14. 14.51 × 15 =
  15. 15.40 × 15 =
  16. 16.19 × 15 =
  17. 17.61 × 15 =
  18. 18.14 × 15 =
  19. 19.48 × 15 =
  20. 20.23 × 15 =
  21. 21.61 × 15 =
  22. 22.24 × 15 =
  23. 23.12 × 15 =
  24. 24.21 × 15 =
  25. 25.16 × 15 =
  26. 26.60 × 15 =
  27. 27.25 × 15 =
  28. 28.22 × 15 =
  29. 29.17 × 15 =
  30. 30.60 × 15 =
  31. 31.41 × 15 =
  32. 32.29 × 15 =
  33. 33.59 × 15 =
  34. 34.13 × 15 =
  35. 35.14 × 15 =
  36. 36.43 × 15 =
  37. 37.62 × 15 =
  38. 38.7 × 15 =
  39. 39.23 × 15 =
  40. 40.64 × 15 =

Answer key

  1. 780
  2. 135
  3. 945
  4. 435
  5. 870
  6. 405
  7. 555
  8. 930
  9. 660
  10. 180
  11. 300
  12. 285
  13. 75
  14. 765
  15. 600
  16. 285
  17. 915
  18. 210
  19. 720
  20. 345
  21. 915
  22. 360
  23. 180
  24. 315
  25. 240
  26. 900
  27. 375
  28. 330
  29. 255
  30. 900
  31. 615
  32. 435
  33. 885
  34. 195
  35. 210
  36. 645
  37. 930
  38. 105
  39. 345
  40. 960

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