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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 661 · 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. 3.19 × 15 =
  4. 4.41 × 15 =
  5. 5.34 × 15 =
  6. 6.51 × 15 =
  7. 7.21 × 15 =
  8. 8.15 × 15 =
  9. 9.47 × 15 =
  10. 10.24 × 15 =
  11. 11.46 × 15 =
  12. 12.34 × 15 =
  13. 13.35 × 15 =
  14. 14.23 × 15 =
  15. 15.48 × 15 =
  16. 16.51 × 15 =
  17. 17.13 × 15 =
  18. 18.21 × 15 =
  19. 19.53 × 15 =
  20. 20.29 × 15 =
  21. 21.11 × 15 =
  22. 22.62 × 15 =
  23. 23.8 × 15 =
  24. 24.19 × 15 =
  25. 25.16 × 15 =
  26. 26.42 × 15 =
  27. 27.37 × 15 =
  28. 28.6 × 15 =
  29. 29.58 × 15 =
  30. 30.7 × 15 =
  31. 31.23 × 15 =
  32. 32.29 × 15 =
  33. 33.4 × 15 =
  34. 34.40 × 15 =
  35. 35.6 × 15 =
  36. 36.42 × 15 =
  37. 37.56 × 15 =
  38. 38.28 × 15 =
  39. 39.41 × 15 =
  40. 40.50 × 15 =

Answer key

  1. 180
  2. 390
  3. 285
  4. 615
  5. 510
  6. 765
  7. 315
  8. 225
  9. 705
  10. 360
  11. 690
  12. 510
  13. 525
  14. 345
  15. 720
  16. 765
  17. 195
  18. 315
  19. 795
  20. 435
  21. 165
  22. 930
  23. 120
  24. 285
  25. 240
  26. 630
  27. 555
  28. 90
  29. 870
  30. 105
  31. 345
  32. 435
  33. 60
  34. 600
  35. 90
  36. 630
  37. 840
  38. 420
  39. 615
  40. 750

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