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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 195 · 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. 1.9 × 15 =
  2. 2.14 × 15 =
  3. 3.52 × 15 =
  4. 4.36 × 15 =
  5. 5.62 × 15 =
  6. 6.45 × 15 =
  7. 7.7 × 15 =
  8. 8.36 × 15 =
  9. 9.44 × 15 =
  10. 10.64 × 15 =
  11. 11.24 × 15 =
  12. 12.22 × 15 =
  13. 13.9 × 15 =
  14. 14.53 × 15 =
  15. 15.49 × 15 =
  16. 16.64 × 15 =
  17. 17.27 × 15 =
  18. 18.50 × 15 =
  19. 19.35 × 15 =
  20. 20.34 × 15 =
  21. 21.21 × 15 =
  22. 22.63 × 15 =
  23. 23.42 × 15 =
  24. 24.58 × 15 =
  25. 25.23 × 15 =
  26. 26.26 × 15 =
  27. 27.22 × 15 =
  28. 28.28 × 15 =
  29. 29.21 × 15 =
  30. 30.58 × 15 =
  31. 31.7 × 15 =
  32. 32.22 × 15 =
  33. 33.14 × 15 =
  34. 34.8 × 15 =
  35. 35.43 × 15 =
  36. 36.18 × 15 =
  37. 37.12 × 15 =
  38. 38.19 × 15 =
  39. 39.8 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 135
  2. 210
  3. 780
  4. 540
  5. 930
  6. 675
  7. 105
  8. 540
  9. 660
  10. 960
  11. 360
  12. 330
  13. 135
  14. 795
  15. 735
  16. 960
  17. 405
  18. 750
  19. 525
  20. 510
  21. 315
  22. 945
  23. 630
  24. 870
  25. 345
  26. 390
  27. 330
  28. 420
  29. 315
  30. 870
  31. 105
  32. 330
  33. 210
  34. 120
  35. 645
  36. 270
  37. 180
  38. 285
  39. 120
  40. 945

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