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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 362 · 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. 1.8 × 15 =
  2. 2.35 × 15 =
  3. 3.34 × 15 =
  4. 4.19 × 15 =
  5. 5.43 × 15 =
  6. 6.12 × 15 =
  7. 7.51 × 15 =
  8. 8.60 × 15 =
  9. 9.41 × 15 =
  10. 10.45 × 15 =
  11. 11.14 × 15 =
  12. 12.58 × 15 =
  13. 13.43 × 15 =
  14. 14.38 × 15 =
  15. 15.37 × 15 =
  16. 16.57 × 15 =
  17. 17.19 × 15 =
  18. 18.49 × 15 =
  19. 19.47 × 15 =
  20. 20.7 × 15 =
  21. 21.7 × 15 =
  22. 22.40 × 15 =
  23. 23.39 × 15 =
  24. 24.34 × 15 =
  25. 25.24 × 15 =
  26. 26.62 × 15 =
  27. 27.48 × 15 =
  28. 28.50 × 15 =
  29. 29.9 × 15 =
  30. 30.64 × 15 =
  31. 31.58 × 15 =
  32. 32.38 × 15 =
  33. 33.18 × 15 =
  34. 34.47 × 15 =
  35. 35.53 × 15 =
  36. 36.37 × 15 =
  37. 37.13 × 15 =
  38. 38.7 × 15 =
  39. 39.63 × 15 =
  40. 40.26 × 15 =

Answer key

  1. 120
  2. 525
  3. 510
  4. 285
  5. 645
  6. 180
  7. 765
  8. 900
  9. 615
  10. 675
  11. 210
  12. 870
  13. 645
  14. 570
  15. 555
  16. 855
  17. 285
  18. 735
  19. 705
  20. 105
  21. 105
  22. 600
  23. 585
  24. 510
  25. 360
  26. 930
  27. 720
  28. 750
  29. 135
  30. 960
  31. 870
  32. 570
  33. 270
  34. 705
  35. 795
  36. 555
  37. 195
  38. 105
  39. 945
  40. 390

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