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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 5 · 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. 1.24 × 15 =
  2. 2.11 × 15 =
  3. 3.21 × 15 =
  4. 4.12 × 15 =
  5. 5.59 × 15 =
  6. 6.30 × 15 =
  7. 7.34 × 15 =
  8. 8.10 × 15 =
  9. 9.45 × 15 =
  10. 10.55 × 15 =
  11. 11.61 × 15 =
  12. 12.26 × 15 =
  13. 13.9 × 15 =
  14. 14.16 × 15 =
  15. 15.11 × 15 =
  16. 16.35 × 15 =
  17. 17.58 × 15 =
  18. 18.9 × 15 =
  19. 19.44 × 15 =
  20. 20.6 × 15 =
  21. 21.20 × 15 =
  22. 22.48 × 15 =
  23. 23.64 × 15 =
  24. 24.44 × 15 =
  25. 25.13 × 15 =
  26. 26.20 × 15 =
  27. 27.14 × 15 =
  28. 28.36 × 15 =
  29. 29.17 × 15 =
  30. 30.45 × 15 =
  31. 31.20 × 15 =
  32. 32.24 × 15 =
  33. 33.17 × 15 =
  34. 34.13 × 15 =
  35. 35.60 × 15 =
  36. 36.24 × 15 =
  37. 37.17 × 15 =
  38. 38.44 × 15 =
  39. 39.14 × 15 =
  40. 40.36 × 15 =

Answer key

  1. 360
  2. 165
  3. 315
  4. 180
  5. 885
  6. 450
  7. 510
  8. 150
  9. 675
  10. 825
  11. 915
  12. 390
  13. 135
  14. 240
  15. 165
  16. 525
  17. 870
  18. 135
  19. 660
  20. 90
  21. 300
  22. 720
  23. 960
  24. 660
  25. 195
  26. 300
  27. 210
  28. 540
  29. 255
  30. 675
  31. 300
  32. 360
  33. 255
  34. 195
  35. 900
  36. 360
  37. 255
  38. 660
  39. 210
  40. 540

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