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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 444 · 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. 1.35 × 15 =
  2. 2.44 × 15 =
  3. 3.8 × 15 =
  4. 4.61 × 15 =
  5. 5.7 × 15 =
  6. 6.36 × 15 =
  7. 7.53 × 15 =
  8. 8.60 × 15 =
  9. 9.18 × 15 =
  10. 10.18 × 15 =
  11. 11.35 × 15 =
  12. 12.24 × 15 =
  13. 13.28 × 15 =
  14. 14.14 × 15 =
  15. 15.7 × 15 =
  16. 16.49 × 15 =
  17. 17.10 × 15 =
  18. 18.5 × 15 =
  19. 19.5 × 15 =
  20. 20.50 × 15 =
  21. 21.54 × 15 =
  22. 22.6 × 15 =
  23. 23.32 × 15 =
  24. 24.56 × 15 =
  25. 25.25 × 15 =
  26. 26.57 × 15 =
  27. 27.50 × 15 =
  28. 28.9 × 15 =
  29. 29.15 × 15 =
  30. 30.58 × 15 =
  31. 31.17 × 15 =
  32. 32.61 × 15 =
  33. 33.22 × 15 =
  34. 34.23 × 15 =
  35. 35.11 × 15 =
  36. 36.17 × 15 =
  37. 37.10 × 15 =
  38. 38.25 × 15 =
  39. 39.55 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 525
  2. 660
  3. 120
  4. 915
  5. 105
  6. 540
  7. 795
  8. 900
  9. 270
  10. 270
  11. 525
  12. 360
  13. 420
  14. 210
  15. 105
  16. 735
  17. 150
  18. 75
  19. 75
  20. 750
  21. 810
  22. 90
  23. 480
  24. 840
  25. 375
  26. 855
  27. 750
  28. 135
  29. 225
  30. 870
  31. 255
  32. 915
  33. 330
  34. 345
  35. 165
  36. 255
  37. 150
  38. 375
  39. 825
  40. 945

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