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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 637 · 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. 1.10 × 15 =
  2. 2.41 × 15 =
  3. 3.21 × 15 =
  4. 4.45 × 15 =
  5. 5.51 × 15 =
  6. 6.12 × 15 =
  7. 7.26 × 15 =
  8. 8.36 × 15 =
  9. 9.6 × 15 =
  10. 10.16 × 15 =
  11. 11.6 × 15 =
  12. 12.41 × 15 =
  13. 13.15 × 15 =
  14. 14.56 × 15 =
  15. 15.49 × 15 =
  16. 16.23 × 15 =
  17. 17.10 × 15 =
  18. 18.40 × 15 =
  19. 19.5 × 15 =
  20. 20.14 × 15 =
  21. 21.23 × 15 =
  22. 22.48 × 15 =
  23. 23.26 × 15 =
  24. 24.20 × 15 =
  25. 25.45 × 15 =
  26. 26.39 × 15 =
  27. 27.39 × 15 =
  28. 28.12 × 15 =
  29. 29.50 × 15 =
  30. 30.5 × 15 =
  31. 31.37 × 15 =
  32. 32.57 × 15 =
  33. 33.6 × 15 =
  34. 34.19 × 15 =
  35. 35.17 × 15 =
  36. 36.24 × 15 =
  37. 37.58 × 15 =
  38. 38.4 × 15 =
  39. 39.35 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 150
  2. 615
  3. 315
  4. 675
  5. 765
  6. 180
  7. 390
  8. 540
  9. 90
  10. 240
  11. 90
  12. 615
  13. 225
  14. 840
  15. 735
  16. 345
  17. 150
  18. 600
  19. 75
  20. 210
  21. 345
  22. 720
  23. 390
  24. 300
  25. 675
  26. 585
  27. 585
  28. 180
  29. 750
  30. 75
  31. 555
  32. 855
  33. 90
  34. 285
  35. 255
  36. 360
  37. 870
  38. 60
  39. 525
  40. 300

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