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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 263 · 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. 1.23 × 15 =
  2. 2.51 × 15 =
  3. 3.30 × 15 =
  4. 4.33 × 15 =
  5. 5.58 × 15 =
  6. 6.25 × 15 =
  7. 7.30 × 15 =
  8. 8.25 × 15 =
  9. 9.11 × 15 =
  10. 10.41 × 15 =
  11. 11.54 × 15 =
  12. 12.42 × 15 =
  13. 13.34 × 15 =
  14. 14.11 × 15 =
  15. 15.7 × 15 =
  16. 16.60 × 15 =
  17. 17.35 × 15 =
  18. 18.18 × 15 =
  19. 19.49 × 15 =
  20. 20.27 × 15 =
  21. 21.37 × 15 =
  22. 22.42 × 15 =
  23. 23.34 × 15 =
  24. 24.36 × 15 =
  25. 25.34 × 15 =
  26. 26.52 × 15 =
  27. 27.58 × 15 =
  28. 28.25 × 15 =
  29. 29.44 × 15 =
  30. 30.32 × 15 =
  31. 31.18 × 15 =
  32. 32.31 × 15 =
  33. 33.53 × 15 =
  34. 34.63 × 15 =
  35. 35.41 × 15 =
  36. 36.55 × 15 =
  37. 37.32 × 15 =
  38. 38.35 × 15 =
  39. 39.16 × 15 =
  40. 40.53 × 15 =

Answer key

  1. 345
  2. 765
  3. 450
  4. 495
  5. 870
  6. 375
  7. 450
  8. 375
  9. 165
  10. 615
  11. 810
  12. 630
  13. 510
  14. 165
  15. 105
  16. 900
  17. 525
  18. 270
  19. 735
  20. 405
  21. 555
  22. 630
  23. 510
  24. 540
  25. 510
  26. 780
  27. 870
  28. 375
  29. 660
  30. 480
  31. 270
  32. 465
  33. 795
  34. 945
  35. 615
  36. 825
  37. 480
  38. 525
  39. 240
  40. 795

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