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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 850 · 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. 2.39 × 15 =
  3. 3.56 × 15 =
  4. 4.36 × 15 =
  5. 5.39 × 15 =
  6. 6.4 × 15 =
  7. 7.43 × 15 =
  8. 8.36 × 15 =
  9. 9.64 × 15 =
  10. 10.53 × 15 =
  11. 11.21 × 15 =
  12. 12.37 × 15 =
  13. 13.42 × 15 =
  14. 14.61 × 15 =
  15. 15.46 × 15 =
  16. 16.40 × 15 =
  17. 17.47 × 15 =
  18. 18.40 × 15 =
  19. 19.30 × 15 =
  20. 20.11 × 15 =
  21. 21.25 × 15 =
  22. 22.39 × 15 =
  23. 23.63 × 15 =
  24. 24.58 × 15 =
  25. 25.14 × 15 =
  26. 26.7 × 15 =
  27. 27.46 × 15 =
  28. 28.17 × 15 =
  29. 29.63 × 15 =
  30. 30.55 × 15 =
  31. 31.26 × 15 =
  32. 32.30 × 15 =
  33. 33.40 × 15 =
  34. 34.35 × 15 =
  35. 35.58 × 15 =
  36. 36.21 × 15 =
  37. 37.25 × 15 =
  38. 38.60 × 15 =
  39. 39.28 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 90
  2. 585
  3. 840
  4. 540
  5. 585
  6. 60
  7. 645
  8. 540
  9. 960
  10. 795
  11. 315
  12. 555
  13. 630
  14. 915
  15. 690
  16. 600
  17. 705
  18. 600
  19. 450
  20. 165
  21. 375
  22. 585
  23. 945
  24. 870
  25. 210
  26. 105
  27. 690
  28. 255
  29. 945
  30. 825
  31. 390
  32. 450
  33. 600
  34. 525
  35. 870
  36. 315
  37. 375
  38. 900
  39. 420
  40. 600

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