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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 12 · 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. 1.6 × 15 =
  2. 2.21 × 15 =
  3. 3.27 × 15 =
  4. 4.24 × 15 =
  5. 5.56 × 15 =
  6. 6.20 × 15 =
  7. 7.9 × 15 =
  8. 8.10 × 15 =
  9. 9.24 × 15 =
  10. 10.24 × 15 =
  11. 11.36 × 15 =
  12. 12.7 × 15 =
  13. 13.4 × 15 =
  14. 14.13 × 15 =
  15. 15.6 × 15 =
  16. 16.24 × 15 =
  17. 17.61 × 15 =
  18. 18.17 × 15 =
  19. 19.56 × 15 =
  20. 20.30 × 15 =
  21. 21.55 × 15 =
  22. 22.47 × 15 =
  23. 23.52 × 15 =
  24. 24.13 × 15 =
  25. 25.46 × 15 =
  26. 26.20 × 15 =
  27. 27.57 × 15 =
  28. 28.13 × 15 =
  29. 29.10 × 15 =
  30. 30.60 × 15 =
  31. 31.8 × 15 =
  32. 32.36 × 15 =
  33. 33.62 × 15 =
  34. 34.26 × 15 =
  35. 35.6 × 15 =
  36. 36.45 × 15 =
  37. 37.15 × 15 =
  38. 38.11 × 15 =
  39. 39.9 × 15 =
  40. 40.35 × 15 =

Answer key

  1. 90
  2. 315
  3. 405
  4. 360
  5. 840
  6. 300
  7. 135
  8. 150
  9. 360
  10. 360
  11. 540
  12. 105
  13. 60
  14. 195
  15. 90
  16. 360
  17. 915
  18. 255
  19. 840
  20. 450
  21. 825
  22. 705
  23. 780
  24. 195
  25. 690
  26. 300
  27. 855
  28. 195
  29. 150
  30. 900
  31. 120
  32. 540
  33. 930
  34. 390
  35. 90
  36. 675
  37. 225
  38. 165
  39. 135
  40. 525

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