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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 633 · 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. 1.45 × 15 =
  2. 2.32 × 15 =
  3. 3.22 × 15 =
  4. 4.33 × 15 =
  5. 5.48 × 15 =
  6. 6.63 × 15 =
  7. 7.41 × 15 =
  8. 8.13 × 15 =
  9. 9.44 × 15 =
  10. 10.57 × 15 =
  11. 11.46 × 15 =
  12. 12.39 × 15 =
  13. 13.13 × 15 =
  14. 14.40 × 15 =
  15. 15.33 × 15 =
  16. 16.56 × 15 =
  17. 17.43 × 15 =
  18. 18.7 × 15 =
  19. 19.53 × 15 =
  20. 20.61 × 15 =
  21. 21.27 × 15 =
  22. 22.16 × 15 =
  23. 23.45 × 15 =
  24. 24.16 × 15 =
  25. 25.13 × 15 =
  26. 26.43 × 15 =
  27. 27.9 × 15 =
  28. 28.32 × 15 =
  29. 29.24 × 15 =
  30. 30.58 × 15 =
  31. 31.57 × 15 =
  32. 32.46 × 15 =
  33. 33.46 × 15 =
  34. 34.61 × 15 =
  35. 35.29 × 15 =
  36. 36.61 × 15 =
  37. 37.49 × 15 =
  38. 38.35 × 15 =
  39. 39.14 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 675
  2. 480
  3. 330
  4. 495
  5. 720
  6. 945
  7. 615
  8. 195
  9. 660
  10. 855
  11. 690
  12. 585
  13. 195
  14. 600
  15. 495
  16. 840
  17. 645
  18. 105
  19. 795
  20. 915
  21. 405
  22. 240
  23. 675
  24. 240
  25. 195
  26. 645
  27. 135
  28. 480
  29. 360
  30. 870
  31. 855
  32. 690
  33. 690
  34. 915
  35. 435
  36. 915
  37. 735
  38. 525
  39. 210
  40. 300

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