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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 209 · 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. 1.5 × 15 =
  2. 2.36 × 15 =
  3. 3.4 × 15 =
  4. 4.11 × 15 =
  5. 5.41 × 15 =
  6. 6.20 × 15 =
  7. 7.50 × 15 =
  8. 8.4 × 15 =
  9. 9.54 × 15 =
  10. 10.16 × 15 =
  11. 11.11 × 15 =
  12. 12.19 × 15 =
  13. 13.20 × 15 =
  14. 14.14 × 15 =
  15. 15.15 × 15 =
  16. 16.4 × 15 =
  17. 17.29 × 15 =
  18. 18.12 × 15 =
  19. 19.57 × 15 =
  20. 20.20 × 15 =
  21. 21.9 × 15 =
  22. 22.38 × 15 =
  23. 23.38 × 15 =
  24. 24.7 × 15 =
  25. 25.57 × 15 =
  26. 26.62 × 15 =
  27. 27.43 × 15 =
  28. 28.37 × 15 =
  29. 29.12 × 15 =
  30. 30.58 × 15 =
  31. 31.12 × 15 =
  32. 32.15 × 15 =
  33. 33.20 × 15 =
  34. 34.23 × 15 =
  35. 35.10 × 15 =
  36. 36.32 × 15 =
  37. 37.54 × 15 =
  38. 38.64 × 15 =
  39. 39.17 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 75
  2. 540
  3. 60
  4. 165
  5. 615
  6. 300
  7. 750
  8. 60
  9. 810
  10. 240
  11. 165
  12. 285
  13. 300
  14. 210
  15. 225
  16. 60
  17. 435
  18. 180
  19. 855
  20. 300
  21. 135
  22. 570
  23. 570
  24. 105
  25. 855
  26. 930
  27. 645
  28. 555
  29. 180
  30. 870
  31. 180
  32. 225
  33. 300
  34. 345
  35. 150
  36. 480
  37. 810
  38. 960
  39. 255
  40. 300

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